Reaching week 15 of pregnancy means you are firmly into your second trimester, a stage many parents describe as the most comfortable of the whole journey. The nausea and exhaustion of the early weeks often begin to ease, and for many there is a welcome return of energy and appetite. At 15 weeks pregnant, your baby is growing quickly and developing in remarkable ways, even though you may not yet feel much happening from the outside.
If you have just followed on from week 14, you will notice that this is a period of steady, reassuring progress. This week is a lovely moment to take stock, understand what is changing, and plan ahead for the scans and appointments that lie in the weeks to come.
Your baby at week 15
By 15 weeks, your baby is roughly the size of an orange or a large apple, typically measuring around 10 centimetres from head to bottom and weighing approximately 70 grams. These figures are general guides only, as every baby grows at their own pace.
This is a busy week for development. Your baby's skeleton is gradually hardening as bones continue to form, and the tiny limbs are becoming more in proportion with the body. The joints are increasingly mobile, so your baby may be moving, stretching and even practising gentle breathing-like motions, all long before you are able to feel it.
Fine, downy hair known as lanugo may begin to appear across the skin, helping to keep your baby warm. The eyes and ears are moving into their final positions, and facial features are becoming more clearly defined. Although the eyelids remain fused shut, your baby is thought to be increasingly sensitive to light filtering through the abdominal wall.
Your body at week 15
Many people feel noticeably better by 15 weeks pregnant, though everyone experiences pregnancy differently. Common and generally normal symptoms around this week can include:
- A small but visible bump as your uterus rises and your waistband starts to feel snug.
- Increased energy compared with the first trimester, though tiredness can still come and go.
- A stuffy nose or occasional nosebleeds, caused by increased blood flow to the delicate lining of the nose.
- Mild round ligament aches as the ligaments supporting your growing uterus stretch.
- Sensitive or bleeding gums, which is why dental care remains important during pregnancy.
- Changes to your skin and hair, including a pregnancy glow or, for some, breakouts.
Some people also begin to notice occasional fluttering sensations, sometimes called quickening, although first flutters are more commonly felt a little later, often between 16 and 24 weeks. If you have been pregnant before, you may recognise these earlier. What is normal varies widely, so try not to compare your experience too closely with others.
What to keep in mind this week
This is a good time to focus on the everyday habits that support a healthy pregnancy, in line with NHS guidance.
- Continue taking your daily vitamin D, and folic acid if you are still within the recommended window.
- Aim for a varied, balanced diet and stay well hydrated as your blood volume increases.
- Keep gently active where you can, whether that is walking, swimming or antenatal-friendly exercise.
- Look after your teeth and gums, as NHS dental care is free during pregnancy and for a year after birth.
- Rest when you need to, and be kind to yourself as your body works hard behind the scenes.
If you would like a clear, personalised overview of the milestones ahead, our pregnancy journey planner can map out your scans and appointments week by week.
Scans, tests and appointments
Week 15 sits in a relatively quiet part of the routine NHS schedule, between the first-trimester scans and the mid-pregnancy anomaly scan. On the NHS, the 20-week anomaly scan is typically offered between 18 and 21 weeks, so it is drawing closer. The whooping cough vaccination is usually offered from around 16 weeks onwards, and later milestones such as the glucose tolerance test, where indicated, generally fall between 24 and 28 weeks.
Some parents choose additional private reassurance during this in-between period. At London Pregnancy Clinic, our Early Fetal Scan offers a detailed look at your baby's development and wellbeing, which can be particularly welcome in the weeks before the anomaly scan. For those keen to find out whether they are expecting a boy or a girl, a private gender scan can typically be carried out from around 16 weeks, so this is an ideal moment to plan ahead.
Whatever you choose, these scans are optional and complement, rather than replace, your NHS antenatal care. Your midwife or clinician can help you understand which options are appropriate for your individual circumstances.
Looking ahead
Week 15 is a stage of quiet but meaningful growth, both for your baby and for you as you grow in confidence through the second trimester. As you move towards week 16, you may edge closer to those first unmistakable flutters and the excitement of the appointments still to come.
Take this week to rest, plan and enjoy the sense of progress. If you would like expert reassurance between your routine NHS scans, our specialist team is here to support you every step of the way.
This article is for general information only and is not a substitute for professional medical advice. Always speak to your midwife, GP or obstetrician about your own pregnancy.
