- Brain activity is detectable and can be measured and recorded.
- First reflex movements – baby turns away in response to light touch on the face at 5½ weeks, moves and responds to stimulation.
Day 41
- Tiny fingers are apparent (toes develop a few days later).
- Baby’s brain is now divided into 3 parts: emotion and language comprehension, hearing, and seeing.
Day 42
- Nerve connections necessary for sense of smell begin to develop.
- Skeleton begins to change from cartilage to bone.
- Baby’s liver takes over production of blood cells.
- Brain begins to control movement of muscles and organs.
- Baby measures approximately ½ inch long from crown to rump.
- Lips, jaw and facial muscles begin to form.
- Eyes darken as they develop their first color in the retina.
Mom misses her second period – this is when most moms notice they are pregnant.
MILESTONES
42
Mom misses her second period – this is when most moms notice they are pregnant.
41 day old embryo
Image credit: The Multi-Dimensional Human Embryo
