Pregnancy Week 16: Your Midwife Appointment and Antenatal Classes

Quick answer: At 16 weeks you have a routine NHS midwife appointment: your blood pressure and urine are checked, your 12-week blood test and screening results reviewed, and a handheld Doppler may let you hear your baby's heartbeat for the first time. You'll also get information about the 20-week anomaly scan. It's a good week to book antenatal classes, as NCT classes fill up quickly.

What parents need to know

Week 16 brings one of your routine NHS antenatal appointments — and for many parents, the moment they've been quietly hoping for: hearing their baby's heartbeat for the first time. This week is also a good time to start thinking about antenatal classes and how you'd like to prepare for the birth.

How big is your baby at 16 weeks?

Your baby is now roughly the size of an avocado — about 11.6cm from crown to rump. From this point onwards, your baby gains weight increasingly quickly, particularly from 28 weeks when fat deposits begin to build up beneath the skin.

What's happening with your baby?

Your baby's eyes, though still sealed, are beginning to make slow side-to-side movements — the early beginnings of sight. Their ears are now in their final position on the sides of the head. Hearing is beginning to develop, and your baby may be able to detect sounds from outside the womb — particularly lower-frequency sounds such as your voice and heartbeat. Research suggests that babies recognise their mother's voice at birth, having heard it throughout pregnancy.

Your baby's circulatory and urinary systems are both working. The heart is pumping approximately 25 litres of blood per day. Toenails are forming, and the skin, while still thin, is developing more layers. Your baby is making coordinated limb movements, though most women don't feel these clearly until weeks 18 to 24 in a first pregnancy.

Your 16-week antenatal appointment

This appointment with your midwife is typically shorter than the booking appointment but covers several important areas. Your midwife will check your blood pressure and urine, and review the results from your blood tests and any screening you chose at 12 weeks. They will discuss the results of your Down's syndrome screening with you and offer any necessary follow-up if needed.

Your midwife may also use a handheld Doppler device to listen to your baby's heartbeat for the first time. Many parents describe this as a deeply moving moment. The heart at this stage beats at around 120 to 160 beats per minute — a rapid, galloping sound.

You'll be given information about your 20-week anomaly scan, which will be arranged for between 18 and 21 weeks of pregnancy.

Antenatal classes: what are your options?

Antenatal classes prepare you and your birth partner for labour, birth, and the early days of caring for your baby. They can be invaluable for first-time parents in particular. The main options in the UK are:

NHS antenatal classes are offered free by most NHS trusts, usually during the third trimester. Ask your midwife when these are scheduled in your area.

NCT (National Childbirth Trust) classes are run by the UK's largest pregnancy charity and are available in most areas. They are not free, but many parents find them extremely valuable, particularly for the social connections formed with other local parents who are due around the same time. Contact the NCT to find classes near you.

Hypnobirthing classes teach relaxation, breathing, and mindset techniques to manage labour. They are available privately and increasingly popular in the UK. Many midwives also incorporate hypnobirthing principles.

Online courses are a convenient option if in-person classes are difficult to access. Look for courses accredited by reputable organisations.

Whatever type of class you choose, it's worth booking early — particularly NCT classes, which fill up quickly.

Mental wellbeing in the second trimester

Perinatal mental health — mental health during pregnancy and the year after birth — is something the NHS takes seriously. Anxiety and depression during pregnancy are more common than many people realise. If you've been feeling persistently low, anxious, or overwhelmed, speak to your midwife at your 16-week appointment. They can refer you to specialist perinatal mental health support if needed.

Your week 16 checklist

This week:

• Attend your 16-week midwife appointment.
• Ask about antenatal classes in your area.
• Begin researching NCT classes and book early.
• Share any concerns about your mental health with your midwife.
• Take a moment to enjoy hearing your baby's heartbeat.