16 Questions
What is the primary mechanism by which oxygen and carbon dioxide cross the placenta?
Simple diffusion
During which weeks does the placenta take over the endocrine function from the corpus luteum?
Weeks 12-17
What is the function of relaxin during fetal development?
Loosens the pelvis and dilates the cervix
What is the primary function of progesterone during fetal development?
Inhibits uterine contractions
When does the production of surfactant by the lungs begin?
Weeks 16-20
What is the primary function of hCG during fetal development?
Stimulates male gonads to produce testosterone
What is the term for the process by which a sperm fuses with an oocyte to form a zygote?
Fertilization
What is the function of the corona radiata and zona pellucida?
To facilitate sperm penetration
What is the term for the release of enzymes by the sperm to penetrate the corona radiata and zona pellucida?
Acrosomal reaction
What percentage of blastocysts fail to implant in the uterus?
50%-75%
What is the function of human chorionic gonadotropin (hCG)?
To maintain the corpus luteum
What is the term for the outer layer of cells that surrounds the embryo?
Chorion
What is the purpose of the yolk sac?
To produce blood cells and germ cells
What is the term for the process by which the embryo develops into a three-layered disc?
Gastrulation
What is the term for the indentation that forms in the primitive streak?
Neural groove
What is the function of the placenta?
To provide oxygen and nutrients to the embryo
Learn about the process of fertilization, where sperm and oocyte combine to form a zygote, and how the majority of sperm are eliminated during this process. Discover the journey of surviving sperm and how they reach the fallopian tubes.
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