fetuses

"The doctor used ultrasound to see the baby inside the mother's womb. "

"an unhatched egg"

"The students are developing their reading skills in their English class. "

"The sequence of events in the school play was: introduction, conflict, climax, and resolution. "

"A dog is a vertebrate because it has a backbone. "

"All he had to show for four years of attendance at college was a framed piece of paper."

"There are eight planets in the solar system."

"He was father to three healthy kids."

"The elephant's gestation period, lasting almost two years, is the longest of any mammal. "

"The scientist studied the reproductive cycle of the fruit flies in her lab. "

"Hydrogen chloride is a diatomic molecule, consisting of a hydrogen atom and a chlorine atom."

"In IVF treatments, doctors carefully monitor the development of fertilized eggs to select the healthiest blastocysts for implantation. "