NUTR 2050 Chapter Notes - Chapter 2: Reactive Oxygen Species, Dna Replication, Anticonvulsant
26 Apr 2017
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Document Summary
Introduction human reproduction is the result of a superb orchestration of complex and interrelated genetic, biological, environmental, and behavioural processes. 30-50% of conceptions are lost by resorption into the uterine wall within the rst 6 weeks after conception. If ovum fertilized by sperm, conception is done, but if ovum is not fertilized by sperm, period of blood ow occurs for 3-7 days called the menstrual period. Stages usually last 26-29 days with the rst half being the follicular phase, and the second being luteal stage: hormonal effects during the menstrual cycle. Estrogen and fsh rise lh levels causing cells to secrete progesterone, which prompt the uterine wall to store glycogen and other nutrients and to expand the growth of blood vessels and connective tissue. On day 14, blood levels of fsh and lh peak, and ovulation occurs. Without fsh and lh, ova do not mature and are not released. Lh from stimulation of progesterone and estrogen production.
