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

How body size and composition affecting the bmr, How Body size and composit...

How Body size and composition affecting the BMR? Basal and resting energy expenditures are related to body size, being most closely correlated with the size of the fat-free mas

Define the anatomical considerations, Define the Anatomical Considerations ...

Define the Anatomical Considerations 1. Neurovascular bundle associated with greater palatine foramen, e.g. palatal root of the upper 1 st molar: Don't do incision at this area

State the medial pterygoid, Medial pterygoid Muscle bounds the pterygom...

Medial pterygoid Muscle bounds the pterygomandibular space medially which is entered when an inferior alveolar nerve block is administered. Infection of this space is dangerous

Explain about the secondary protein derivatives, Explain about the Secondar...

Explain about the Secondary Protein Derivatives? These are the products of further hydrolytic cleavage of the protein molecule, Examples include: a) Proteoses: Soluble in wa

What are the main representatives of the pteridophytes, What are the main r...

What are the main representatives of the pteridophytes? Is this plant group cryptogamic or phanerogamic? The better known pteridophytes are the ferns and the maidenhairs, from

Explain the equilibrium dialysis, Explain the Equilibrium Dialysis? Equ...

Explain the Equilibrium Dialysis? Equilibrium dialysis is a useful technique for studying the binding of a small uncharged solute species (a ligand) to a macromolecule. The mac

Skin, SKIN - Largest organ of body. It is covered by hair...

SKIN - Largest organ of body. It is covered by hairs or pelage i.e. pillifera. Study of skin is dermatology. Outermost covering of body. Skin is elastic and

Define results of miscellaneous conditions, Results :  In the present day,...

Results :  In the present day, surgical mortality with or without CABG is repture to be 5-7 per cent. The late survival is 85 per cent, 75 per cent and 65 per cent at 1, 3 and 5

Chemical energy of matter, Chemical energy of matter : As is obvious from ...

Chemical energy of matter : As is obvious from  the above  account  living cells  obtain  energy  by breaking   C-C and C-H bonds  of organic  matter under the  process of catabol

Calcium - mineral elements, CALCIUM It is the most abundant mineral of...

CALCIUM It is the most abundant mineral of animal body. Calcium is available in all types of vegetables, grain, milk, cheese, eggs, fish and butter. By its deficiency r

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