Baby is the size of a
lemon
Baby this Week
- Organs begin to function.
- The pancreas is producing insulin and the kidneys are producing urine.
![](https://www.duringpregnancy.com/wp-content/uploads/13weekspregnant.jpg)
How Big is Baby?
Baby is 2.91 inches long (7.4 cm)
(Measured from crown to rump)
Baby weighs 0.81oz (23 grams)
*Metrics above are estimates of baby at 13 weeks
![](https://www.duringpregnancy.com/wp-content/uploads/13.jpg)
Your Developments
- 2.3 – 3.5 lb (1 to 1.5kg) weight gain over the past month. On average 10 1/2 oz (300 gms) a week.
- Possible increase in perspiration.
- Gum problems may result from an increase in blood flow.
Pregnancy To Do’s
- Visit your dentist now as chances for dental problems increase during pregnancy.
- Remember to tell your dentist you are pregnant.
![](https://www.duringpregnancy.com/wp-content/uploads/13weeks-womb-grad.jpg)