💡 Remember this: Fertilisation occurs when sperm and egg nuclei fuse to form a diploid zygote. In humans, this process happens in the oviduct (fallopian tube), not in the uterus where the embryo will later develop.

🔍 Understanding hormone graphs: When looking at menstrual cycle hormone graphs, notice how FSH and LH peak just before ovulation, while progesterone rises after ovulation. If pregnancy doesn't occur, progesterone levels fall, leading to menstruation as the endometrium sheds.

🧠 Quick fact: Identifying the fertile window is possible through natural signs—body temperature rises by about 0.5°C and cervical mucus becomes thin and watery during ovulation, which is useful knowledge whether trying to conceive or avoid pregnancy!

🧬 Genetic inheritance patterns: Understanding inheritance patterns helps predict the likelihood of genetic conditions. Autosomal recessive traits require two carrier parents, dominant traits appear in every generation, and sex-linked disorders affect males more frequently than females since males have only one X chromosome.