| 1 cametogenesis,fertilization,an the irst week origin ofthe gem line meiosis;gametogenesis in the male and female;the menstrual cycle;fertilization;cleavage clinical applications chromosomal anomalies,contraceptive techniques and strategies of assisted reproduction expermental principles genetic regulation of germ cell formation,proliferation,mi-gration,and developme 2 the second week development of the bilaminar germ disc and establish-ment of the uteroplacental circulation clinical applications hydatidiform mole experimental principles genomic lmprinting 3 the third week castrulation,formation of the trilaminar germ disc,and lnitial development of the somites and neural tube clinical applications abnormal gastrulation experimental priciples regulation of deve lopment by cascades of gene expression 4 the fourth week differentiation of the somites and the nervous system;segmental evelopment and lntegration clinical appl |
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