When is the egg released? correct answersDay 14
How many days does it take a released egg to reach the uterus? correct answers2-4 days
How many days does it take an egg to implant? correct answers2-4 days (6-8 days after
ovulation)
An implanted egg needs to be fertilized within ___ of implantation. correct answers72 hours
Where does fertilization occur? Sperm + egg is what? correct answers-Outer third of fallopian
tube (closest to ovary)
-Zygote
When does division of cells of zygote occur? correct answersOccurs after fertilization in
fallopian tube and then reaches uterus
Discuss the preembryonic stage. correct answers-First 14 days of human development
Cleavage occurs
Blastomeres form morula
12-16 cells; enters uterus (day three) correct answersMorula
Morula has what two parts? correct answersBlastocyst and trophoblast
Ball of cells (the baby) correct answersBlastocyst
Make up placenta and amniotic sac correct answersTrophoblast
Discuss implantation. correct answersOccurs 6-10 days after fertilization
Blastocyst burrows into endometrium
Endometrium is now called decidua
During implantation, what is increased which causes the relaxation of smooth muscle? correct
answersProgesterone
What hormone is looked at when a woman is unable to get pregnant? Why? correct answers-
Progesterone
-If smooth muscle of uterus is not relaxed, implantation cannot occur
What are the three primary germ layers? correct answersEctoderm
Mesoderm
Endoderm