How Life Begins: From Sperm to Baby | The Human Body Explained

How does human life truly begin — from sperm to baby?

This medically accurate 6-minute explainer takes you on the biological journey of life — from fertilization in the fallopian tube to the baby’s very first heartbeat.

In this video, you’ll discover:
🧫 How sperm travel and survive inside the female reproductive tract
🧬 How fertilization happens inside the fallopian tube (ampulla)
🪸 How the zygote divides to become a blastocyst
🌱 How the blastocyst implants into the uterus
🩸 How the placenta and umbilical cord start forming
❤️ When the embryo’s first heartbeat begins (around 20–23 days after fertilization)

All information is verified from trusted medical research sources:
🔹 Cleveland Clinic — https://my.clevelandclinic.org

🔹 University of California, San Francisco (UCSF Health) — https://www.ucsfhealth.org

🔹 National Institutes of Health (NIH) — https://www.nih.gov

🔹 StatPearls / NCBI Bookshelf — https://www.ncbi.nlm.nih.gov/books

🔹 Wilcox AJ et al., 1999 – BMJ Study on Implantation Timing
🔹 Männer J. et al., 2022 – Systematic Review on the Human Embryonic Heartbeat

🧪 Based on current embryology and medical research, this video is part of “The Human Body Explained: From Cells to Life” — a continuous educational series exploring how our body forms, grows, and evolves.