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Fertilization and Implantation in human
Educational only: videos on MedicalVideos.com are for general information and are not medical advice. Always consult your own doctor about your health.
Millions of sperms are deposited into the vagina during sexual intercourse. The sperms make their way through the cervix into the uterus and then on to the fallopian tubes. As they swim along this way their numbers decline. Only a few hundred sperm will get close to the egg. During the trip, sperm prepare themselves to meet the egg by subtle alterations of their heads and movement patterns. Once inside the fallopian tube, the sperm attracts the egg by releasing a chemical. The egg is surrounded by a protective covering called the zona pellucida, which allows only one sperm to penetrate it. Once inside the egg, the head of the fertilizing sperm releases its genetic contents, which fuses with the nucleus of the egg. Fertilisation is now complete. Sperm are able to survive for 2-3 days within the female's reproductive tract. The length of the time that a woman's egg can be fertilized by a man's sperm ranges from 12-24 hours.
This video in 30 seconds
This video explains fertilization and implantation in humans, describing how sperm travel through the cervix and uterus to the fallopian tubes. It describes how only a few hundred sperm get close to the egg, how one sperm penetrates the protective covering called the zona pellucida, and how the genetic contents fuse with the nucleus of the egg to complete fertilisation.
Key points
- The journey of sperm through the cervix and uterus to the fallopian tubes is described
- Declining sperm numbers during the trip and preparation of sperm to meet the egg are covered
- Penetration of the zona pellucida by one sperm is described
- Fusion of the sperm's genetic contents with the nucleus of the egg is explained
- Survival times for sperm in the female reproductive tract and for fertilization of the egg are stated
Video Overview
This video presents “Fertilization and Implantation in human” — Millions of sperms are deposited into the vagina during sexual intercourse. The sperms make their way through the cervix into the uterus and then on to the fallopian tubes. As they swim along this way their numbers decline. Only a few. Whether you are preparing for a procedure, studying the technique, or learning how a condition is assessed, the recording shows the process as it is performed in practice.
From our Gynecology collection: Pelvic exams, Pap smears, IUD insertion, hysteroscopy and women's health procedures explained step by step. Browse all Gynecology videos →
Educational content only — not a substitute for professional medical advice.
Medical Videos
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Founded by Dr. Mohamed Ibrahim, MD, PhD — physician-scientist.
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