Overweight women often gain less weight than our leaner counterparts during pregnant and that's fine. The main concern is eating properly - not over-eating, and definitely not dieting. Pregnancy is not the time to try to lose weight.
Does weight effect conception rates? What about body fat distribution?
Study shows that very lean women and very obese women had lower conception rates. However, body fat distribution was found to have a greater impact. Women with a high waist-hip ratio had greater trouble conceiving.
| Keep in mind that rapid weight loss can cause fertility problems such as a reduction in progesterone, a slow down in follicle growth, and ovulatory dysfunction. It is certainly more important to have a balanced diet then to be the perfect weight. |
What are the most common weight-related reasons for infertility?
The two most common problems are excess estrogen and polycystic ovary syndrome (PCOS). Along with both of these is a greater chance of a luteal phase defect (LPD).
Estrogen: the problem is that if you get too much estrogen your body reacts as if it is on birth control. Ovulation may not occur or it may be inadequate. An inadequate ovulation contributes to LPD, mentioned below.
PCOS: This is a endocrine disorder with any combination of several symptoms. These symptoms include irregular cycles, cysts in the ovaries, ovulatory pain, anovulation, acne, excess body hair (face, chest, below navel, toes), heavy and painful periods. Diagnosis involves both a physical exam, usually including an ultrasound to check ovaries, and blood work.
LPD: The luteal phase in the time between ovulation and menses. The ideal length is 14 days, 12-16 being normal. There are a number of ways to diagnose the problem, including serum progesterone tests 7 days post-ovulation, endometrial biopsies, and the length of the luteal phase can be observed by charting basal body temperatures and/or being aware of when ovulation occurred. LPD can be caused by inadequate ovulation, so improving the quality and perhaps quantity of follicles produced will help straighten things out so that the lining is properly supported.
Eating an adequate diet in necessary regardless of what supplements you are taking. The goal should be to lose weight slowly and intelligently using an eating plan that would be good for pregnancy, and actually for the rest of your life! If it isn't a life-plan change, it won't work. Be sure to get plenty of folic acid and calcium. One should start taking pre-natal vitamins, or the equivalent, at least 3 months before trying to get pregnant.