Week 13 of pregnancy: Mother and Babies development and changes


8 cm

Pregnancy after the First Trimester: Development Milestones

As you progress into the thirteenth week of your pregnancy, exciting developments are underway for both you and your baby. In this stage, your baby, at approximately 8cm, is becoming increasingly active, displaying movements such as stretching, and turning. Despite these dynamic activities, the baby’s size remains too small for you to feel these movements directly.

Fetal Development: A Closer Look

Your baby’s head is now proportionally about a third of the size of their body, and as the weeks unfold, their physical proportions start resembling those of a newborn. Notably, at this stage, your baby has developed vocal cords, teeth, and even fingerprints, adding unique features to their growing identity.

In terms of functionality, your baby’s kidneys are beginning to work by sending urine to the bladder, contributing to the ongoing development of essential organs.

Changes in Your Body: Preparing for Birth and Breastfeeding

Breast Development and Changes

Simultaneously, changes in your body are taking place in preparation for childbirth. Your mammary glands and ducts are actively developing, causing your breasts to feel lumpy. This transformation is part of the natural process as your body readies itself for breastfeeding.

As your breasts undergo these changes, the breast’s production of a thin yellow liquid called colostrum begins, although not usually noticeable until the third trimester. Packed with essential nutrients, colostrum serves as the initial nourishment for your baby after birth, preceding the flow of regular milk..

Breast Care Considerations

It’s worth noting that your breasts might undergo significant changes during pregnancy and postpartum. While underwired bras haven’t been proven harmful, some healthcare professionals recommend opting for non-underwired bras. This choice allows for the natural alterations your breasts experience and minimizes potential interference with developing milk ducts.

Importantly, breast size does not dictate your ability to breastfeed. Regardless of size, you should be able to breastfeed if you choose to do so. If you have concerns or questions about these bodily changes, reaching out to healthcare professionals, such as our Careline team available between 9 am and 6 pm, Sunday to Thursday, can provide guidance and reassurance.

Coping with Tiredness and Fatigue in Pregnancy

As your body undergoes these remarkable transformations, it’s common to experience fatigue and tiredness during pregnancy. Understanding and managing these symptoms is crucial for a healthy and comfortable pregnancy experience. If you find yourself grappling with these challenges or have any concerns about the changes occurring in your body, don’t hesitate to seek support and advice.


Changes Description
Fetal Development Baby’s head proportionally a third of body size. Vocal cords, teeth, and fingerprints develop. Kidneys start functioning.
Breast Development and Changes Mammary glands and ducts actively develop, causing breast tenderness. Production of colostrum begins, precursor to regular milk.
Breast Care Considerations Consider non-underwired bras to accommodate changes. Breast size doesn’t affect breastfeeding ability.
Coping with Tiredness and Fatigue in Pregnancy Common experience of fatigue and tiredness. Understanding and managing symptoms is crucial. Seek support if needed.

Feel free to contact us on our careline number, available from sunday to thursday 9 to 5 pm: