Pregnancy life changes in week 13

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You have a small baby in your womb, which is about the size of an egg when you reach the thirteenth week of pregnancy. This is the time when you actually share the great news of your pregnancy to most of your close ones.

Your baby will be around 7.5cm long and just about the size of an egg. The baby also weighs around 25g. By now, your baby might have already learnt some ‘skills’ by kicking their legs and turning their head. Apart from all these, they must have also learnt to swallow, yawn and hiccup!


In the thirteenth week, your baby’s skeleton is beginning to grow with the clavicle (which is the collarbone) and femur, (which is the thigh bone) developing first. Along with the skeleton, the organs also continue to develop with their stomach and bowel farming shape as well as their vocal chords.

Your baby’s lungs are also growing and in the thirteenth week they’ll begin to take their initial few ‘breaths’. They’ll be taking oxygen in their blood from the umbilical cord as amniotic fluid surrounds them, so instead it’ll be just like they’re breathing underwater.

When the baby reaches the 13th week, their kidneys will be functioning and any amniotic fluid your baby swallows, they will pee out.

See how your baby is developing

  • Your baby is beginning to swallow and also urinate the amniotic fluid.
  • Your baby’s head will be more proportional now and around one third size of its body.
  • The baby will now possess his own individual set of fingerprints.


Fingerprints are developing on your baby’s little fingertips, its veins and organs are distinctly visible through their still-thin skin, and its body is beginning to catch up with its head – which makes up only a third of her body size. If you’re having a girl, she will now have more than 2 million eggs in her ovaries. Your baby is approximately 3 inches long and will weigh almost an ounce.

How Big is Your Baby This Week?

Your beautiful darling is the size of that of a Meyer lemon this week—and its vocal cords will start to develop.

Baby’s Length: The length of the baby will be 2.91 inches.

Baby’s Weight: The baby will weigh 0.81 oz.


A peek inside your womb

Amniotic sac with fluid: The baby’s urinary tract is now working properly; the baby starts to urinate out the amniotic fluid that it had been swallowing.

Fingers: Your baby will have its own individual set of fingerprints.

Head: The head of the baby will be more proportional; it’s around a third the size of his body.


How your life’s changing


The 13th week of your pregnancy is the last week of the first trimester, and your chance of miscarriage is now much lesser than earlier in pregnancy. Next week indicates the starting of your second trimester, a time of comparative comfort for the many women who view early pregnancy signs such as morning sickness and fatigue sink.Many women also find a clear increase in their sex drive around this time.

Birth is still a few months away, however, your breasts may have already begun making colostrum, which is the nutrient-rich fluid that nourishes your baby for the first few days after its birth, before your milk begins to flow.