High-risk pregnancies — Flashcards

Flashcard 41: vitamin A (excess)

Answer: spontaneous abortion, cleft palate, cardiac abnormalities

Flashcard 42: How many chorions and amnions develop when a zygote splits after Day 12?

Answer: 1 chorion, 1 amnion, conjoined twins

Flashcard 43: fetal alcohol syndrome

Answer: maternal consumption of alcohol during pregnancy

Extra: mental retardation, pre- and post-natal developmental retardation, microcephaly, holoprosencephaly, facial abnormalities, limb dislocation, heart and lung fistula

Flashcard 44: Dizygotic twins arise from _____ egg(s) and _____ sperm.

Answer: 2

Flashcard 45: Monozygotic twins arise from _____ egg and _____ sperm.

Answer: 1

Flashcard 46: How many chorions and amnions develop when a zygote splits between Day 0-4?

Answer: 2 chorions, 2 amnions

Flashcard 47: How many chorions and amnions develop when a zygote splits between Day 4-8?

Answer: 1 chorion, 2 amnions

Flashcard 48: How many chorions and amnions develop when a zygote splits between Day 8-12?

Answer: 1 chorion, 1 amnion

Flashcard 49: gonads (ovaries and testes)

Answer: mesoderm

Flashcard 50: deformation (organogenesis)

Answer: extrinsic disruption; occurs after embryonic period