Pregnancy Week 13

At 13 weeks pregnant, your baby is growing quickly and may measure around 7.4cm from head to bottom — about the length of a pea pod. The placenta will keep developing throughout pregnancy, helping pass oxygen and nutrients from your blood supply to your baby, and carrying waste products away.

Inside the gums, the tiny foundations for your baby’s milk teeth are forming. These teeth will stay hidden for months after birth, but the groundwork is already being laid.

Your baby’s intestines are also maturing. The lining of the intestines begins to develop tiny finger-like projections called villi, which will later help absorb nutrients from food.

At 13 weeks pregnant, you may still feel more tired than usual. Even if nausea is beginning to ease, your body is still doing a huge amount of work behind the scenes.

You may also still need to wee more often. In early pregnancy, this is partly because of hormonal changes and increased blood flow through your kidneys. As your uterus grows, it can also press on your bladder, although this varies from person to person.

If this is not your first pregnancy, you may notice changes earlier than you did last time. Your abdominal muscles and ligaments have been through pregnancy before, so you may feel fuller or start showing sooner.

You might already be reaching for looser waistbands or maternity clothes, or you may still look exactly the same. Both are normal.

The end of the first trimester can feel like a milestone. You may be starting to feel a little more confident, especially if you have had a scan or are preparing to share the news more widely.

That said, reaching this stage does not magically switch off every worry. You may still feel cautious, tired, emotional, or unsure how much to tell people. If symptoms are easing, that can feel like a relief - or it can make you anxious because the signs of pregnancy feel less obvious.

If this is your second or later pregnancy, you may also be juggling early pregnancy tiredness with looking after another child, work, school runs or family life. It is okay if this pregnancy feels different from the last one, emotionally as well as physically.

Try to give yourself room to adjust. You are moving into a new phase, but you do not need to suddenly feel organised, glowing or ready for everyone’s opinions.

Week 13 is a good moment to look after the practical basics of early second trimester life. Bladder infections can be more common in pregnancy, so take urinary symptoms seriously. Try not to hold urine for long periods, drink regularly, and contact your GP or midwife if you have pain or burning when you wee, cloudy or strong-smelling urine, a high temperature, lower tummy pain, back pain, or you feel generally unwell.

Second-trimester basics to consider: