Week 26 of Pregnancy

Baby now weighs about a pound and two-thirds and measures 14 inches (an English hothouse cucumber), from head to heel. The nerve pathways in his ears are developing, which means his response to sounds is growing more consistent. His lungs are developing now, too, as she continues to take small breaths of amniotic fluid — good practice for when he's born and takes that first breath of air. If you're having a boy, his testicles are beginning to descend into his scrotum — a trip that will take about two to three days.