Physiology of Pregnancy
Physiology of Pregnancy
Normal PregnancyPregnancyThe course that the embryo and thefetus grow in the maternal bodyStages of pregnancyEarlypregnancy:≤12weeks2Mid pregnancy: ≥13 weeks,≤27 weeks3.Late pregnancy:≥28 weeks4. Term pregnancy:≥37 weeks,<42 weeks
Normal Pregnancy • Pregnancy The course that the embryo and the fetus grow in the maternal body • Stages of pregnancy 1. Early pregnancy: ≤12 weeks 2. Mid pregnancy: ≥13 weeks,≤27 weeks 3. Late pregnancy:≥28 weeks 4. Term pregnancy:≥37 weeks,<42 weeks
Formation of EmbryoFertilization1.Place: oviduct (ampulla)2. Processcapacitation →acrosome reactionpenetrate the zona pellucidasecond meiosis →zygote
Formation of Embryo • Fertilization 1. Place: oviduct (ampulla) 2. Process capacitation → acrosome reaction→ penetrate the zona pellucida→ second meiosis →zygote
Formation of EmbryoImplantation1. requirement1) Disappear of zona pellucida2)Formation of syncytiotrophoblast3)Synchronized development ofblastocyst and endometrium4Adequate progesterone
Formation of Embryo • Implantation 1. requirement 1) Disappear of zona pellucida 2) Formation of syncytiotrophoblast 3) Synchronized development of blastocyst and endometrium 4) Adequate progesterone
Formation of Embryo2. Process1) morula (day 3) → enter uterinecavity (day 4) → earlyblastocyst→ late blastocyst(day 6-7) → implantation2) location→ adherence→penetration
Formation of Embryo 2. Process 1) morula (day 3) → enter uterine cavity (day 4) → early blastocyst→ late blastocyst (day 6-7) → implantation 2) location→ adherence→ penetration