‹ Biology simulationsBiology · IGCSE 0610 · 16 Reproduction: sexual reproduction in humans, sex hormones and STIs‹ Biology simulationsBiology · IGCSE 0610 · 16 Reproduction: sexual reproduction in humans, sex hormones and STIsSeven 3D simulations covering Topic 16.4 Sexual reproduction in humans, 16.5 Sex hormones and 16.6 Sexually transmitted infections. Explore the reproductive systems, watch fertilisation and implantation, see how the fetus is supported, step through the menstrual cycle and test ways of controlling HIV. Tabs marked Extended cover the Supplement.
Diagrammatic 3D models of the male and female reproductive systems. Click a part, or pick it from the list, to see its function.
The sperm and the egg cell are shown at the same scale. Fertilisation is the fusion of the nucleus of a sperm with the nucleus of an egg cell. Release the sperm and watch.
| sperm | egg cell | |
|---|---|---|
| size | very small (head about 5 µm) | large (about 0.1 mm) |
| structure | head with acrosome, midpiece, flagellum | cytoplasm with energy stores, jelly coat |
| motility | swims using its flagellum | cannot move by itself |
| numbers | millions released | usually one a month |
An egg released from the ovary is fertilised in the oviduct. The zygote divides into a ball of cells, the embryo, which moves down to the uterus and implants in its lining. Move through the first week.
The embryo develops into a fetus inside the uterus. Click the structures that support it.
In the placenta the blood of the mother and the blood of the fetus come very close but do not mix. Substances diffuse across. Watch which way each one goes, and see what else can cross.
Each month an egg matures in the ovary and the lining of the uterus thickens, ready for a fertilised egg. Move through the 28 days and watch the ovary, the uterus lining and (Extended) the hormones that control them.
A sexually transmitted infection (STI) is passed on through sexual contact. HIV is a virus that causes an STI and may lead to AIDS. Run the model of a community and switch on ways of controlling the spread.
Seven interactive 3D simulations for Cambridge IGCSE Biology 0610 topic 16 Reproduction, humans: clickable diagrammatic male and female reproductive systems with puberty hormones, sperm and egg cells at the same scale with fertilisation, the first week from zygote to implantation, the fetus with placenta, umbilical cord and amniotic sac, exchange across the placenta, the menstrual cycle with FSH, LH, oestrogen and progesterone, and a model of HIV spread and its control.
Seven 3D simulations covering Topic 16.4 Sexual reproduction in humans, 16.5 Sex hormones and 16.6 Sexually transmitted infections. Explore the reproductive systems, watch fertilisation and implantation, see how the fetus is supported, step through the menstrual cycle and test ways of controlling HIV. Tabs marked Extended cover the Supplement.
Human reproduction is a free, browser-based simulation for Cambridge IGCSE Biology 0610 (topic 16 Reproduction, sections 16.4 Sexual reproduction in humans, 16.5 Sex hormones in humans, 16.6 Sexually transmitted infections). The course is assessed in Paper 1/2 (Multiple choice), Paper 3/4 (Theory), Paper 5 (Practical Test), Paper 6 (Alternative to Practical). Syllabus for examination in 2026-2028. There are 7 tabs, each a self-contained experiment with its own controls and live readings, and nothing to install: it runs on a laptop, tablet or classroom projector.
Full syllabus map: IGCSE Biology 0610 topic 16.
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