Pregnancy calendar

weeks pregnant

16 weeks pregnant - all you need to know

Your baby is now about the size of a lemon.

16 weeks infographic.

What does my baby look like at week 16?

Did you feel a little flutter? Perhaps a bubbling sensation? This could be your baby moving! Don’t worry if you haven’t felt anything like this yet though - it’s still early days. Read more about baby's movements here.

Your baby’s nervous system continues to develop, and the muscles in their tiny limbs can flex. They can make a fist and might even grab and pull their umbilical cord.

If it’s your second pregnancy you might feel them sooner.

If you could see their face, you might be able to see them making facial expressions, like a frown or squint. They can’t control these facial muscles yet though.

Your pregnancy symptoms in week 16

Varicose veins in pregnancy

Pregnancy hormones can make your veins stretch. This, together with the increased blood supply to your skin, can lead to varicose veins.

Cramping in your legs?

If you’re being kept awake at night by sudden sharp pains in your leg, try gently exercising your legs, ankles and feet during the day - and see if that prevents it.

Are you suffering from a headache, indigestion or faintness?

Here’s our guide to 10 common pregnancy complaints (and how to avoid them).

Don’t lie on your back after 16 weeks

After 16 weeks, lying - or exercising - on your back can sometimes cause low blood pressure and dizziness. Try to avoid lying on your back for long periods of time. If you do a class like yoga or pilates, simply let your instructor know so they can adapt exercises for you.

Find out more about what exercise you can do in pregnancy.

What to do in week 16

Relationships and pregnancy

You might be relieved that you have got this far. But you might also be thinking about how life may change for you and your relationships. If you’re in a relationship, take some time with your partner. When your baby is born, quality time alone together will be limited for a while.

If you’re feeling anxious about the pregnancy or any other issues it’s also worth taking some time out to talk about your feelings with someone close to you. Ask your midwife about any pregnancy-related concerns you might have. Alternatively you can call the Tommy's PregnancyLine and speak to one of the midwives on 0800 0147 800; or email us at midwife

If you're struggling to cope with your feelings, tell your midwife or doctor how you feel.

Second antenatal appointment

When you’re about 16 weeks pregnant, you’ll have a second antenatal appointment with your midwife to check baby size and fetal development. You may also get to listen to your baby’s heartbeat.

At this appointment, you may also get the results of any blood tests you had at your booking appointment.

“Hearing my baby’s heart beat was wonderful and so reassuring. I miscarried my first baby and the midwife explained that any time I was worried, we could have a listen in. This was very comforting to know.”

Sara, mum of two

At each antenatal appointment from now on your midwife will take your blood pressure and check a urine sample for signs of increased protein. These are ways to make sure you’re not at risk of developing pre-eclampsia,. which is a serious pregnancy condition. They will also measure your baby, checking on growth.

Don't forget to bring your pregnancy notes with you.


NHS Choices . You and your baby at 13–16 weeks pregnant’, : (Page last reviewed: 28/02/2017  Next review due: 28/02/2020)

Lennart Nilsson (2009) A Child is Born, Johnathan Cape, p.170.

NICE (2008) Antenatal care for uncomplicated pregnancies,Clinical guideline [CG62] Last updated: January 2017.

RCOG (2006) Recreational Exercise and Pregnancy: Information for you, London, Royal College of Obstetricians and Gynaecologists:

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Last reviewed on June 25th, 2018. Next review date June 25th, 2021.

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  • By Truelle (not verified) on 30 Oct 2018 - 19:33

    My girl is 16weeks today she had pains and inflammation at night we worry if everything is alright pls give us any info u have on pregnancy n fibroid

  • By Midwife @Tommys on 2 Nov 2018 - 11:03

    Hi Truelle,
    Sorry to hear that your partner has been in pain, as I am sure you know fibroids can cause pain, however nay pain in pregnancy should be checked out therefore I would suggest that you contact your midwife or doctor for a review.
    Best wishes
    Tommy's midwife

  • By Lily (not verified) on 6 Aug 2018 - 22:02

    Hello. I had a stillbirth at 38+6weeks 3 years ago. I'm 16 weeks today,the doctors said I will have to go in labour at no later than 37 weeks. When would be my due date exactly? Midwife wrote down 21st of January but it should be earlier than that if I go at 37 weeks. And how exactly is that going to happen? C-section? Or stimulation? My midwife haven't really explain all that to me, I'm quite curious

  • By Midwife @Tommys on 8 Aug 2018 - 16:03

    Hi Lily
    Congratulations on this pregnancy. It will be an anxious time for you after the loss of your baby 3 years ago. But your midwife and obstetric will be there to support you.
    Your due date is when you are 40 weeks pregnant. This date is worked out by using the date of the first day of your last period, your average cycle length and in relation to the ultrasound scan you had at 12 weeks.
    Your doctor/midwife will discuss this in detail with you further into your pregnancy. They may induce you with a pessary or gel to ripen the cervix, then they may break your waters. This is induction of labour- we have a web page on this if you want to check it out.
    All the best
    Tommy's Midwife

  • By Aisha !! (not verified) on 3 Aug 2018 - 16:36

    I m 16 weeks pregnant & doctor advised me to do anomalay scan tomarrow. I m so worried that isn’t it too earlier ??

  • By Midwife @Tommys on 6 Aug 2018 - 10:11

    In the UK the anomaly scan is done between 18 and 22 weeks.

  • By Ankita (not verified) on 21 Jul 2018 - 23:51

    My last period was on 30th March ,2018..Then in april and May I missed my periods .But in mid of May month I tested my pregnancy it was negative .Then on 2nd of june again I did test and it showed me positive .Being a PCOD patient I have had irregular periods.So I just want to know how far along I am pregnant.I am not getting any appointments yet and have not had my first scan .
    Please help
    Thanks in advance .

  • By Midwife @Tommys on 25 Jul 2018 - 14:58

    Hi Ankita
    The very most pregnant you could be is 16+5 days today going by your last menstrual period. However ,with the history you have given, it sounds like with you irregular periods, that you will be less than this when you go for your scan. It is hard to tell with your irregular cycles but the sonographer will measure your baby and give you a due date and current gestation based on this measurement.
    Good luck and enjoy your scan
    Sophie,Tommy's Midwife

  • By Linzi (not verified) on 17 Jul 2018 - 11:17

    Hi im 16 weeks and ive got high blood pressure its 166/100 i have been put on medication for it. But im still got really bad headache at the front of my head. I drink a lot of water and take pain killers but i can't cope with the headaches is there any thing i can do to stop them.

  • By Midwife @Tommys on 18 Jul 2018 - 12:35

    Hi Linzi
    Having high blood pressure and that fact you are having really bad headaches is likely to be linked. I would like you to go to the maternity unit's triage/labour ward to be reviewed as soon as possible please. You may be experiencing early onset pre-eclampsia. You will need your urine checked,a midwife review, a doctor review, some bloods taking to check your liver function, urea and electrolytes, full blood count, and your c-reactive proteins too. This will help to indicate if you do have pre-eclampsia
    You may also be experiencing blurred or spots in your vision, pain under your right breast, and swelling on your hands, feet or face.
    It is really important that you are seen soon.
    All the best
    Sophie,Tommy's Midwife

  • By ff (not verified) on 27 Jun 2018 - 20:30

    Hi, plz let me know how many appointments should a pregnant women have in 2nd trimester. I had one appointment at about 11weeks,an ultrsound at 13 week, some blood tests at 12 i have to move to another country at about 23 weeks,so my gynae told me to have later checkups when i reach there.plz advice should i wait or have how many appointments in the 2nd trimester.

  • By Midwife @Tommys on 29 Jun 2018 - 10:00

    If this is your first baby then you would normally have a midwife appointment at 16 weeks, then your anomaly scan between 18-21 weeks and further midwife appointments at 25 and 28 weeks which include another blood test. 10 weeks would be too long without appointment and your anomaly scan is important to check that the baby is growing developing well so I would suggest to try and make some further appointments before you move.
    Best wishes
    Tommy's midwife

  • By Natasha (not verified) on 9 Jun 2018 - 08:13

    Hi. From what I have been reading I should be having another appointment at 16 weeks. I don’t have one until 18 weeks and my anomaly scan at 21 weeks, as scheduled by my midwife.
    Should I be having my appointment at 16 weeks instead of 18 weeks?
    I’m a first timer and probably overthink everything!

  • By Midwife @Tommys on 11 Jun 2018 - 14:46

    Hi Natasha, The 16 week appointment is a chance to see you and check that you are well and that all your blood tests have been reviewed and recorded. Your urine is checked and blood pressure recorded. It is a chance for you to ask any questions that you may have and to discuss booking antenatal classes. The size of your bump will be measured and many midwives will offer to listen to the fetal heart, (although this is not mandatory at 16 weeks). If you are anxious you could ask to bring your appointment forward but if you feel well, in most situations it is ok to leave this until 18 weeks. Best wishes and take care.

  • By Orateng Mosokwe (not verified) on 16 May 2018 - 19:04

    My girlfriend went to see her midwife today, the visit didn't go well as they struggled to hear the baby's heart beat. What could be the problem and do we need to worry?

  • By Midwife @Tommys on 17 May 2018 - 13:37

    Hi Orateng,

    At 16 weeks is can be difficult to find a heartbeat at such an early gestation as the baby is so small and your midwife should of reassured you of this before attempting to find your baby's heartbeat. If the midwife thought that there may be a problem then she would of referred you to the hospital.
    If you are still worried then we would suggest that you call your community midwife again so that she can explain why she struggled to find it and if you need to be seen again, but in general it can be difficult to find a heartbeat so early. Hope this helps, take care, Tommy's Midwives x

  • By Zoe (not verified) on 15 May 2018 - 13:03

    I’m 16 weeks tomorrow and constantly wanting to go to wee.. I feel absolutely fine in myself but the pressure on my bladder makes me want to wee a lot! Is my uterus pressing on my bladder at this stage? I have a tiny bump so wonder whether things are moving up inside !

  • By Midwife @Tommys on 15 May 2018 - 14:45

    Hi Zoe,
    Yes, your uterus may have grown to a size that puts some pressure on your bladder. However, to be on the safe side, i do also recommend that you go to your GP to have your urine dipped to make sure you do not have a UTI. UTI's can cause a sudden increase in frequency of urination, as well as itching, stinging, burning, pressure sensations. Your urine may look a normal colour, but it may also look very concentrated and or smelly.
    I would get your urine checked, if that is clear of infection, then it is simply down to the position of your uterus as you suggested. Please feel free to get in touch if we can be of any further assistance.
    All the best
    Sophie, Tommy's Midwife

  • By Lizette (not verified) on 17 May 2018 - 15:58

    I will be 16weeks tomorrow and my first visit to the hospital was useless because I was ask to came back after 8weeks reason being that my Tommy was too tiny and nothing was heard and that day when Igot home, I felt my baby's position and after three of that sign, nothing showed up till this morning again. Am I safe?

  • By Midwife @Tommys on 17 May 2018 - 16:14

    Hi Lizette,
    It is difficult to understand what you are trying to explain but if you are worried about your baby's movements or anything in your pregnancy then we would recommend that you go back to the hospital and be checked over so that you can speak to a Dr or midwife and they can reassure about what is happening in your pregnancy. Hope this helps, Take Care, Tommy's Midwives x

  • By theresah (not verified) on 11 May 2018 - 14:30

    can I take omega 3 medicine when my pregnant is 16 weeks

  • By Midwife @Tommys on 11 May 2018 - 15:00

    Hi Theresah,
    Omega 3 is often found in some pregnancy multivitamins, so it maybe worth checking that you are not already taking some. Whilst there is no evidence to suggest there is any risk taking it, its not advised by guidelines that you need to. We would advise to focus on a healthy balanced diet including fish, health oils and seeds/nuts.
    Best wishes
    Tommy's midwives

  • By silvia (not verified) on 11 May 2018 - 11:57

    l saw my last period on 29th January and l want to know my due date. Thanks

  • By Midwife @Tommys on 11 May 2018 - 12:11

    Hi Silvia,
    If you have a regular 28 day cycle then your due date would be about the 5th November, however by now you should have had a scan who will have given you a due date. If this has not happened then do contact your GP or midwife straight away to get one booked as soon as possible.
    Best wishes,
    Tommy's midwives

  • By Leen (not verified) on 9 Apr 2018 - 13:17

    Hi! My last period was December 25 last year.. and me and my husband had an unprotected sex January 5,2018 .. when was baby start to develop? or when exactly I got pregnant?

  • By Midwife @Tommys on 10 Apr 2018 - 13:28

    Hi Leen
    Using your last menstrual period date of 25/12/17, you are currently approx 15 weeks pregnant - but this is likely to change a little depending on your pregnancy scan dates. It is hard to know exactly when you conceived as sperm survives for up to 5 days. If you need to call us to speak to us about this in more detail, please do on 0800 0147800
    All the best
    Sophie,Tommy's Midwife

  • By Anonymous (not verified) on 12 Apr 2018 - 01:52

    My last period was December 24 of last year and I am 15 weeks and 3 days today so you should be just a day shy of me. Congrats to you

  • By Bia (not verified) on 30 Mar 2018 - 13:04

    Now a days sometimes I fell as something is pussing my belly outwards from different areas but only once or twice in a day and for only some mommemts and on different areas
    What is this
    Gas , baby movement or anything else?
    Plz reply

  • By Midwife @Tommys on 4 Apr 2018 - 09:13

    Hi Bia
    It sounds like you are starting to feel the first few fetal movements, this can occur from around 16 weeks onwards. Movements can feel like flutters, or rolls or little kicks. All of these are normal. If you are ever concerned by the movements you are feeling, then it is sensible to visit your local maternity unit triage/day assessment unit. Please take care
    Sophie ,Tommy's Midwife

  • By Priceless (not verified) on 20 Feb 2018 - 12:34

    Hi didi 16 weeks pregnant and getting severe pains in womb

  • By Midwife @Tommys on 21 Feb 2018 - 10:37

    Hi Priceless
    Please take yourself into hospital urgently to be seen by a midwife and doctor if you are having severe pains in your tummy! You need to be reviewed. Please take care of yourself and don't for get your notes.
    Best wishes
    Sophie,Tommy's Midwife

  • By Anonymous (not verified) on 2 Feb 2018 - 18:20

    Hi Tom , my last menustral period was in August don’t know the actually date but haven’t had a period since then . I’m scared because I didn’t know I was pregnant this whole time until I started feeling symptoms . I go for my first appointment next week . I would like to know how many weeks ahead am I ? And if I’m okay?

  • By Midwife @Tommys on 5 Feb 2018 - 09:52

    It is possible that you are anything up to 25 weeks pregnant if your last period was mid August. Best advice is to wait until your appointment this week and see a midwife who will be able to advise you.

  • By Eve (not verified) on 30 Jan 2018 - 01:44

    My last period was the 13th of October and we had unprotected sex the 22nd of October how many weeks am I and when will I be due. Please calculate for me...

  • By Midwife @Tommys on 31 Jan 2018 - 11:13

    Hi Eve, using your LMP of 13th Oct, you would be no more than 15-16 weeks pregnant.
    Your estimated due date with these dates would be around the 19th july 2018.
    If you have not already started your midwife care and had ultrasound scans, you really do need to make an appointment as you would be quite late in accessing your care.
    If you need to talk though what you need to do, you can call us on 0800 0147800
    All the best
    Sophie,Tommy's Midwife

  • By Mommyof5 (not verified) on 3 Feb 2018 - 15:30

    My lmp was also oct 13th. I just made 16 weeks yesterday and I am due July 20th

  • By Anonymous (not verified) on 3 Mar 2018 - 07:15

    You are 20 weeks.. baby due friday 20th july

  • By Anonymous (not verified) on 7 Dec 2017 - 11:44

    I married july 15 th and we had unprotected sex on the 17th of July and went for a pregnancy test on 30thAugust, which tested positive.the doctor said I was 6 weeks two days cos My last menstruation was 26th do I know my due date?

  • By Midwife @Tommys on 7 Dec 2017 - 14:09

    Hi, Thank you for your comment.

    As a rule, you can take the day of your last period 26th June, add 9 months and then add 7 days. This will give you a due date of around the 2nd April.
    This would make you around 23 weeks and 5 days today. If you need any further information please email the Tommy's Midwives on [email protected] Hope this helps, Take care, Tommy's Midwives x

  • By Anonymous (not verified) on 4 Nov 2017 - 20:11

    Hi just wondering is it normal to have all round bell pains I've had them a little longer than 24 hours now and still having them I was up half the night as couldn't get comfortable is this normal or should I be worried I'm also havig a fever with this and headaches?

  • By Midwife @Tommys on 6 Nov 2017 - 14:49

    As you are pregnant it would be sensible to see your GP if you have fever, headache and pains. Rest may be your best option but your GP would be able to assess you and advise. In the meantime remember to keep yourself well hydrated. Best wishes

  • By Anonymous (not verified) on 21 Oct 2017 - 08:42

    Hi, I had my dating scan at 13weeks and then booked in for my 20 week scan.! I opted for the DS test and we came back not high risk but following this we received 2 scans for February and March.. (We're due mid April) What are these scans for?

  • By Midwife @Tommys on 23 Oct 2017 - 11:44

    Hi, This may be appointments sent in error. As long as you have the anomaly scan booked for around 20 weeks this will enable you to check whether any further scan appointments are needed. Good luck x

  • By Chloe (not verified) on 26 Oct 2017 - 23:20

    Hey. I'm also due mid April. Also had a ds test and come up low risk. I have also been sent scan for Feb and march, these are growth scans as cosultant believes my previous hday birth weight of 7lb was small ? And because of my bmi. But hey, I get to see my baby twice more lol. If you've had a child previously you might have growth scans?

  • By Rose (not verified) on 16 Oct 2017 - 05:47

    Hello am 16 weeks pregnant and my problem is that I don't feel

  • By Midwife @Tommys on 16 Oct 2017 - 11:35

    Hi Rose, Not all of your message came through but presume you are worried that you are not feeling much movement at 16 weeks. It is not uncommon at this stage. Many women will first feel their baby move between 16-24 weeks, so you have only just come into this rough bracket. You will begin to feel gradual flutters, bubbles, movements soon. So please don't worry at this stage. Every women experiences movements at a different time/pattern. Please take good care of yourself

  • By Anonymous (not verified) on 12 Oct 2017 - 00:41

    I had my last period on July 1st I went for the ultrasound they said that I am 15 weeks 6day how

  • By Midwife @Tommys on 12 Oct 2017 - 10:25

    Hi, Thank you for your comment.
    When calculating the gestation of a pregnancy, we take the first day of the last period as the starting week, so if your last period was the 1st July then you should be around 15-16 weeks which you are on your scan. We include the first two weeks before conception when dating a pregnancy, so you may have expected to be 13-14 weeks but including these 2 weeks, you are 15-16 weeks like your scan has said. Hope that this helps but if you need further explanation then please contact the Tommy's Midwives on [email protected] or call 0800 0147 800 Monday to Friday 9am-5pm. Take Care, Tommy's Midwives x

  • By Shalini (not verified) on 9 Sep 2017 - 01:08

    I had my first prenatal appointment on 23rd August. In the ultrasound scan I was told that I was 12weeks 6days. I had my first day of last period on 4th May. My calculations for the due date comes to Feb 18th. Please advise

  • By Midwife @Tommys on 11 Sep 2017 - 16:20

    Hi - Congratulations on your pregnancy.
    Using the ultrasound dating of 12+6 weeks on 23/08/17 - your estimated due date would be around 03/03/2018.
    The sonographers go by the measurements of the baby, so sometimes these estimated due dates and current gestation, can change by a few weeks. If you are unsure, please go back to your midwife/doctor/sonographer to clarify.
    Look after yourself

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