From a single cell to a complex human life

Reproductive System, Part 4 - Pregnancy & Development: Crash Course Anatomy & Physiology #43 · 10:45 · Video: CrashCourse · Watch at the source

In short: Trace the extraordinary biological journey of human development, from the initial zygote stage through the complex hormonal shifts that trigger labor and the anatomical transformations within the mother.

This video explores the intricate stages of pregnancy, beginning with the cleavage stage where a zygote divides into blastomeres, eventually forming a morula and then a blastocyst. It further examines the transition from embryo to fetus.

Beyond the developing organism, the video details the significant anatomical changes experienced by the mother and the specific hormonal sequences that culminate in the stages of labor: dilation, expulsion, and placental delivery.

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