Your pregnancy and baby guide
You and your baby at 13 weeks pregnant
Open all pages about Your pregnancy and baby guide
- Secrets to success
- Am I pregnant?
- Early days
- Week by week
- Preparing for the birth
- Work out your due date
- Tests scans and checks
- Your pregnancy (antenatal) care
- Your health and wellbeing
- Existing health problems
- Common pregnancy ailments
- Pregnancy-induced conditions
Labour and birth
- The start of labour
- The birth
- Emotions and worries
- Premature babies
- How to breastfeed
- Breastfeeding problems
- Lifestyle and breastfeeding
- Bottle feeding
- Newborn screening tests
- Newborn essentials
- New parents
- New mums
- Twins and multiples
Babies and toddlers
- Weaning and solid foods
- Baby health and care
- Spotting signs of serious illness
- Reflux in babies
- How to take a baby's temperature
- Reducing the risk of SIDS
- Treating a high temperature
- Sleep problems in children
- Coughs, colds and ear infections
- Diarrhoea and vomiting
- Infectious illnesses
- Children's medicines
- Looking after a sick child
- Serious conditions and special needs
- Constipation in young children
- Your baby's height and weight
- Baby health and development reviews
- Leg and foot problems in children
- Learning, play and behaviour
- Safety and accidents
Your baby at 13 weeks
Your baby weighs around 25g.
Your baby's ovaries or testes are fully developed inside their body, and the genitals are forming outside their body.
Where there was a swelling between the legs, there will now be a penis or clitoris growing, although you will not usually be able to find out the sex of your baby at an ultrasound scan at this stage.
You at 13 weeks
If you've been feeling sick and tired with morning sickness, you'll probably start to feel better when you're around 13 or 14 weeks pregnant.
Some women start to experience an increased sex drive around this time, possibly as a result of pregnancy hormones or increased blood flow to the pelvic area. Some women do not, and this is perfectly normal. Read more about sex in pregnancy.
You'll notice a small bump developing as your womb grows and moves upwards. If you've been feeling the urge to pee more often over the last few months, it's because your womb was pressing on your bladder. This should ease off now.
See your doctor if you notice any pain when you pee. Urinary tract infections can happen in pregnancy, and it's important to treat them quickly to reduce the risk of kidney infection.
Things to think about
Find out about the pregnancy care you can expect if you're having twins.
You're advised to have your whooping cough vaccination between 16 and 32 weeks of pregnancy.
Find out about gestational diabetes and how you'll be screened for it.
If you're pregnant or have children under the age of 4 you may be entitled to vouchers for milk, fruit, vegetables and formula milk, if you receive certain benefits or you're under 18.
The Start4Life site has more about you and your baby at 13 weeks of pregnancy.
You can sign up for Start4Life's weekly emails for expert advice, videos and tips on pregnancy, birth and beyond.
Page last reviewed: 04/10/2019
Next review due: 04/10/2022