🔄 Prenatal development proceeds through these stages:
Fertilization occurs when a human egg and sperm fuse, combining 23 female chromosomes and 23 male chromosomes to produce 46 chromosomes.
The germinal stage lasts from day 0 to day 14 and ends with implantation of the blastocyst into the uterine wall.
1. Which sequence best represents the main progression of prenatal development from conception to attachment in the uterus?
2. What is the initial stage of prenatal development called, during which the fertilized egg attaches to the uterine wall?
3. What happens during fertilization in human prenatal development?
What are the main stages of prenatal development?
Fertilization, zygote formation, cellular division, blastocyst formation, and implantation.
Prenatal stages
Fertilization, Zygote, Embryonic, Fetal
When does the fetal stage of prenatal development occur?
From week 9 to week 38.
Fertilization process
Egg and sperm fuse, 46 chromosomes
What does nature refer to in prenatal development?
Genetic influences.
Germinal stage duration
Day 0–14, ends with implantation
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