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Chorionic Villi. Fig. 29.7. Placenta. Fig. 29.7. Fig. 14.3 cf. Fig. 29.6 and 29.11a,b. Arey, Developmental Anatomy. Embryonic Development. Early Fetal Period. Fig. 29.11. Fetal Development weeks 9 - birth. Fig. 29.11. Trimesters of Pregnancy. First trimester (weeks 1-13)
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Chorionic Villi Fig. 29.7
Placenta Fig. 29.7
Fig. 14.3 cf. Fig. 29.6 and 29.11a,b Arey, Developmental Anatomy Embryonic Development
Early Fetal Period Fig. 29.11
Fetal Development weeks 9 - birth Fig. 29.11
Trimesters of Pregnancy • First trimester (weeks 1-13) • pre embryonic, embryonic, early fetal stages • formation of organ systems • Second Trimester (weeks 14-26) • increasing function of organ systems • “quickening” • Third Trimester (weeks 27-birth) • growth and maturation of organ systems • increasing viability