The menstrual cycle 0.0 / 5 ? BiologyNervous system, hormones and behaviourGCSEEdexcel Created by: Jazzy15Created on: 13-03-19 09:52 How often does the menstrual cycle occur ? It occurs about every 28 days 1 of 19 Where do most of these changes take place in the cycle ? In the ovaries and the uterus 2 of 19 What happens on week 1 of the cycle ? Menstruation occurs - the breakdown of the uterus lining 3 of 19 How long does menstruation take ? 5 days 4 of 19 What 2 hormones control the cycle ? Oestrogen and progesterone 5 of 19 What happens on week 2 of the cycle ? The lining of uterus is gradually built up 6 of 19 What takes place on day 14 ? Ovulation - the release of an egg from an ovary 7 of 19 What is likely to take place on day 14 to 16 of the cycle ? Fertilisation - the fusion of haploid gametes, egg and sperm, to form the diploid zygote 8 of 19 What happens during week 3 and 4 ? The lining of the uterus continues to build up 9 of 19 What happens at week 4/ end of the cycle ? If fertillisation does occur then the uterus lining is maintained and menstruation does not happen 10 of 19 What is contraception ? It is the prevention of fertilisation 11 of 19 What are some examples of hormonal contraception ? Hormone pills, implants or injections 12 of 19 What are some examples of barrier methods ? Male and female condoms, the diaphragm, caps and sponges 13 of 19 What do these types of barrier methods of contraception help to do ? To stop the sperm from reaching the egg 14 of 19 Which contraceptive method is more effective when preventing pregnancy ? Hormonal contraceptives 15 of 19 Which contraceptive method protects users against sextually transmitted diseases (STIs) ? A barrier method - using a condom 16 of 19 Do hormonal contraceptives protect you against (STIs) ? No they don't as ... 17 of 19 What is one advantage of an implant ? compared to the pill Longer lasting, so don't need to remember a daily pill 18 of 19 What is one disadvantage of an implant ? compared to the pill If the woman wants to have a baby, she has to get her implant removed 19 of 19
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