Contraceptive pill - reproduction, Biology

Assignment Help:

Contraceptive Pill - Reproduction

About sixty million women in the world are currently using oral steroid contraceptives. These contraceptives usually consist of a synthetic estrogen combined with synthetic progesterone in the form of pills that are taken once each day for three weeks after the last day of menstrual period. This procedure causes an immediate increase in blood levels of ovarian steroids (from the pill), which is maintained for the normal duration of a monthly cycle. As a result of negative feedback inhibition of gonadotropins secretion ovulation never occurs. The entire cycle is like a false luteal phase, with high levels of progesterone, estrogen and low levels of gonadotropins.

Since the contraceptive pills contain ovarian steroid hormones, the endometrium proliferates and becomes secretory just as it does during a normal cycle. In order to prevent an abnormal growth of the endometrium, women stop taking the pill after three weeks. This causes estrogen and progesterone levels to fall, and permits menstruation to occur. The contraceptive pill is an extremely effective method of birth control, but it does have potentially serious side effects-including an increased incidence of thromboembolism, cardiovascular disorders, and endometrial and breast cancer. It has been pointed out, however, that the mortality risk of contraceptive pills is still much lower than the risk of death from the complications of pregnancy or from automobile accidents.


Related Discussions:- Contraceptive pill - reproduction

Phylum nematoda (nemathelminthes ), PHYLUM  NEMATODA (= NEMATHELMINTHES ) ...

PHYLUM  NEMATODA (= NEMATHELMINTHES ) Definition and Introduction                                                                             Bilateral  and protostomial

What are the possible effects on the fetus, What are the possible effects o...

What are the possible effects on the fetus if, during pregnancy, the mother (a) smokes, (b) catches rubella?   a) Smoking during pregnancy can lead to an underwe

Carbon cycle, state 3 ways human activities add carbon to the atmosphere

state 3 ways human activities add carbon to the atmosphere

Can the heat capacity of water be taken small or large, Q. Can the heat cap...

Q. Can the heat capacity of water be taken small or large ? What is the biological importance of that characteristic? Ans. From Thermology it is define that the quantit

What is a glucose tolerance test, What is a glucose tolerance test? A g...

What is a glucose tolerance test? A glucose tolerance test, usually conducted in the 24 to 28 weeks of pregnancy measures levels of sugar (glucose) in the mother's blood. Abnor

What are degenerative diseases, Q. What are degenerative diseases? The ...

Q. What are degenerative diseases? The Degenerative diseases are non-infectious prevalent diseases whose incidences increase with aging.

Bacteria-virus-types of procaryotes, Bacteria: Bacteria have a protect...

Bacteria: Bacteria have a protective covering called 'cell wall'. Beneath this. there is a plasma membrane which encloses protoplasm of the bacterium containing various types

Prothoracic gland or ptc, Prothoracic Gland or PTC Prothoracic gland ...

Prothoracic Gland or PTC Prothoracic gland (PTC) or moulting gland and ecdysone or moulting hormone The 3 rd endocrine gland-prothoracic gland- is an irregular branching

Zoology, why phylum protozoa is called protozoa?

why phylum protozoa is called protozoa?

Why is meiosis important for the maintenance, Why is meiosis important for ...

Why is meiosis important for the maintenance of the normal quantity of chromosomes of a species with sexual reproduction? A reduction to a half of the maximum normal quantity o

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd