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Contraceptive pill It is not all the same: his compositions vary greatly and, because of that, the side effects are very different in each case.
Basically, they can be classified into two groups: combined progestogen and tablets pills. The main difference is that the former contains a combination of two hormones (estrogen and progestogen usually) and the second has only the progestogen, and so it is also called the mini pill.
Although progestogen does not increase the risk of thrombosis, it also has drawbacks, which makes it is not always indicated. Here are the differences between the two types of birth control pill.
Differences between the pills
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According to the gynecologist and obstetrician Fabio Cabar, the combined pill is more effective in preventing pregnancy than no plan pill of a hormone only because they act in different ways.
The mini pill changes the cervical mucus and makes inadequate endometrium for the rise of sperm, but not always blocks ovulation of the woman, as when she takes the combined contraceptive.
"The progestogen pill can promote ovulation blockade, but to a much lesser extent than caused by the combined. It also has an efficacy lower than the combined, and its failure rate around 2.5 / 100 women / year, "explains Cabar.
According Cabar, the Cerazette and Kelly pills are exceptions because they contain desogestrel and have similar capacity to the combined pills inhibit ovulation. "It is essential, however, a very great rigor in the use, including the time of taken," he explains.
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Apart from lower efficacy, the progestogen pill, like the IUD and Implanon can cause irregularities in the menstrual cycle.
"The biggest problem when we use contraceptives that contain only progestogen, either by implantation, is the IUD or the pill, is that they have a tendency to cause continuous bleeding, especially in the first months," says gynecologist and professor at Unicamp Ilza Maria Urbano Monteiro.
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The gynecologist and president of the Brazilian Federation of Gynecology and Obstetrics (Febrasgo), César Fernandes, said the risk of a woman between 20 and 40 who do not take pill having thrombosis is 4 cases per 10,000 women / year.
When a woman goes to take the only progestogen pill, the risk of thrombosis remains unchanged. But when it comes to taking the combined pill, the risk of thrombosis rises to 8 cases per 10,000 women / year.
While the risk is double, Fernandes says that he still is very low and that the indication of the ideal pill for every woman should be made after the doctor evaluate the clinical history of it, or if other family women have had thrombosis if she went through some recent surgery, it is thrombophilic, etc.
"The risk exists, but the epidemiological point of view is acceptable, which allows regulatory agencies approve the pills," says gynecologist.
When the mini pill is indicated?
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The mini pill is indicated when the woman can not take estrogen for some reason. For example, women in the postpartum and / or who are breastfeeding can not take the combined pills because they are now more likely to have a stroke, but can take the progestogen pill, also known as a hormone only.
Risks of the contraceptive pill
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