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Journey of Human Development: Pregnancy to Childbirth

Discover the miraculous stages of human development from fertilization to childbirth, understanding each phase including cleavage, organogenesis, and more. Explore the hormones, changes in uterus, and significant developments of reproductive organs during pregnancy.

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Journey of Human Development: Pregnancy to Childbirth

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  1. Pregnancy Ch 46b

  2. Human Development

  3. Stages of Development Pre-Embryonic Development Fertilization Cleavage Embryonic Development Gastrulation Organogenesis Fetal Development

  4. Fertilization

  5. Ovum and Sperm

  6. sperm head

  7. Fertilization first polar body metaphase of second meiotic division

  8. Fertilization sperm pronucleus polar bodies oocyte pronucleus

  9. Cleavage

  10. Cleavage

  11. Implantation

  12. Embryonic Development

  13. Embryonic Development

  14. FetalDevelopment

  15. FetalDevelopment

  16. Development of Reproductive Organs

  17. The Placenta

  18. The Placenta

  19. 6 months ultrasound

  20. Changes in Uterus

  21. Stages of Childbirth or Labor Dilation Stage Expulsion Stage Placental Stage

  22. Dilation Stage

  23. Expulsion Stage

  24. Placental Stage

  25. Hormones Involved in Labor Estrogen Fetal Oxytocin Placental Prostaglandins Maternal Oxytocin Relaxin

  26. Oxytocin Estradiol + fromovaries from fetusand mother’sposterior pituitary Fig. 46-18 Induces oxytocinreceptors on uterus Positive feedback Stimulates uterusto contract Stimulates placenta to make + Prostaglandins Stimulate morecontractionsof uterus

  27. Mammary Gland

  28. Hormones Involved in Lactation Estrogen & Progesterone Prolactin Releasing Hormone Prolactin Human Chorionic Somatomammotropin Oxytocin

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