Male and female reproductive systems allow human reproduction ... produce the eggs and the hormones that regulate the ovulation cycle. Each cycle an egg travels from an ovary through the oviduct ...

Fertilisation close fertilisationThe joining of a male and female gamete. happens if the egg cell meets and joins with a sperm cell in the oviduct. The fertilised egg attaches to the lining of the ...

Hormones act as messengers within the human body — performing essential ... the changing balance of hormones in a woman's reproductive cycle. Then "take the pill" to see how synthetic hormones ...

The Neolithic communities of the Iberian Peninsula were already strategically and efficiently managing cattle herds 6,000 ...