Human Development

Stages of Development

Pre-Embryonic DevelopmentPre-Embryonic DevelopmentFertilizationFertilizationCleavageCleavage

Embryonic DevelopmentEmbryonic DevelopmentGastrulationGastrulationOrganogenesisOrganogenesis

Fetal DevelopmentFetal Development

Fertilization

Ovum and Sperm

sperm headsperm head

Fertilization

metaphase of second meiotic division

first polar body

polar bodies

spermpronucleus

oocytepronucleus

Fertilization

CleavageCleavage

CleavageCleavage

Implantation

Embryonic Development

Embryonic Development

FetalDevelopment

FetalDevelopment

Development of Reproductive

Organs

The Placenta

The Placenta

6 months ultrasound

Changes in Uterus

Stages of Childbirth or Stages of Childbirth or LaborLabor

Dilation StageExpulsion StagePlacental Stage

Dilation Stage

Expulsion Stage

Placental Stage

Hormones Involved in Hormones Involved in LaborLabor

EstrogenEstrogenFetal OxytocinFetal Oxytocin

Placental ProstaglandinsPlacental ProstaglandinsMaternal OxytocinMaternal Oxytocin

RelaxinRelaxin

Labor Hormones

Mammary Gland

Hormones Involved in Hormones Involved in LactationLactation

Estrogen & ProgesteroneEstrogen & ProgesteroneProlactin Releasing HormoneProlactin Releasing Hormone

ProlactinProlactinHuman Chorionic SomatomammotropinHuman Chorionic Somatomammotropin

OxytocinOxytocin