At this point in pregnancy, your baby will start gaining approximately 6 ounces of weight per week. Other fetal development that is occurring when you are 23 weeks pregnant includes the following:
Eyebrows and eyelashes are forming
Lips are becoming more distinct
Eyes are becoming more developed, but they still lack color
The bones of the middle ear begin to harden
The pigment that colors your baby's skin is being deposited this week