Obesity Consequences On The Fertility
The stoutness does not stop growing in North America. Besides other health problems which the weight increasing entails, the obese persons should worry about what it would also have important incidences on their fertility.
Indeed, a body mass index higher than 27 kg/m2 multiplies 3 times the risk of infertility.
Mechanisms for women
The body fat affects the production of gonadoliberin (GnRH), hormone which activates the Luteinizing Hormone (LH) and the Follicle-Stimulating Hormone (FSH), both essential to the ovulation.
Via this hormonal disorder, a weight excess can thus alter the ovulation quality and, indirectly, that of the oocyte and the uterine mucous membrane.
The polycystic ovarian syndrome (PCOS) or ovarian dystrophy is often put forward in the relations between weight excess and infertility.
At the obese women, prevalence of the PCOS is estimated at 30 %, against 5 % at the women with normal weight.
Mechanisms for men
For men, the obesity can affect the testosterone production and by this way can entail erectile dysfunctions.
The weight excess would also entail a reduction in LH and FSH hormones, with consequences on the quality and the quantity of sperm cells.
Certain studies consider that the sperm concentration keeps decreasing in 1,5 % per year in the USA and in the other Western countries. This decrease was not elucidated in the countries where the obesity is less prevailing.
The obese men also have a decreased sexual frequency compared with the men with a normal weight what can be partially explained by a risk increased to suffer from erectile dysfunction.