blastocyst

"The farmer used fertilizer to promote the fertilization of the soil, making it ready for planting. "

"After her mastectomy, she chose to have a breast implant to restore her body image. "

"My ready money is low, so I can't afford the new textbook. "

"The after-school program is a great way for kids to continue learning. "

"He had something of his mother in him."

"After fertilization, the egg divides repeatedly, forming a blastula, a hollow ball of cells that's an early stage in embryo development. "

"The scientist studied the embryo to understand how the early stages of development occur. "

"The child develops her reading skills with practice. "

"Mary danced into the house."

"The early shift at the bakery starts at 4:00 am. "

"The zoo has a wide variety of mammalian species, from tiny bats to massive elephants. "

"The doctor explained that the fertilized egg implants in the uterus, where it will grow into a baby. "