Fetal Development

Week by week your body is changing, here is an inside look at some of what is happening. The information below is from the US National Library of Medicine (https://www.nlm.nih.gov/medlineplus/ency/article/002398.htm):

Week 5 - Your baby’s brain, spinal cord and heart begin to develop.
Week 6-7 - Baby’s heart continues to grow and now beats at a regular rhythm.
Week 8 - Lungs start to form
Week 9 - Baby’s toes can be seen.
At the end of the 10th week of pregnancy, your baby is no longer an embryo. It is now a fetus, the stage of development up until birth.
Week 11-14 - The head is very large—about half of the baby’s size
Week 15-18 - Baby begins to move and stretch
Week 19-21 - Your baby can hear and you should be able to feel baby moving.
Week 22 - Baby is more active with increased muscle development
Week 23-25 - Bone marrow begins to make blood cells
Week 26 - All parts of baby’s eye are developed and baby may startle in response to loud noises.
Week 27-30 - The nervous system is developed enough to control some body functions
Week 31-34 - Baby’s bones are fully developed, but are still soft.
Week 35-37 - Baby weights about 5 ½ pounds and muscles and bones are fully developed.
Week 38-40 - Fingernails may extend beyond fingertips.
In your 40th week of pregnancy, it's been 38 weeks since conception, and your baby could be born any day now.