Reported miscarriages increased in OB (1.4 [1.11–1.77]) women.
While the number of miscarriages increased in the group receiving supplements containing FA, the difference between groups did not reach statistical significance (RR = 1.10, 95% CI 0.97-1.26).
With age, fertility decreases, the number of miscarriages increases as well as the frequency of congenital birth defects in the newborns (Gosden, 1985; Hassold & Chiu, 1985; Stein, 1985; Gindoff & Jewelewicz, 1986; Piette et al., 1990) (Fig. 2a).
Compared to healthy controls, the risk of miscarriage increased 3-fold (OR 3.1; 95% CI 1.8 5.6) in these patients.
Concurrently, the proportion of women reporting a history of miscarriage increased from 9.3% in 1980 to 15.8% in 2008.
BV is associated with preterm birth and an increased risk of spontaneous miscarriage, increased risk of acquiring sexually transmitted infections (STIs), particularly genital herpes and HIV, as well as with post-abortion endometritis and post-hysterectomy vaginal cuff infection [ 1].
Obstetrician/gynecologists have known for quite a while that as women age, their risk of miscarriage increases, as does the risk of having children with Down syndrome or other genetic defects.
The risk of miscarriage increases with age and is enhanced by a trend in developed countries to postpone childbearing to late 30s and early 40s with declined fertility rates [ Nybo Andersen et al., 2000; Group TECW, 2010].
A stepwise increasing relation was found between amount of exercise and risk of miscarriage, where risk of miscarriage increased by amount of exercise up to HR = 3.7 (95% CI 2.9 4.7) for women who exercised more than 7 hours per week compared with nonexercisers.
Other adverse complications identified infrequently included higher rates of miscarriage, increased rates of unplanned caesarean section, general unspecified obstetric complications, maternal morbidity or mortality, conditions of fatigue, high cholesterol, decreased cardiac fitness, post natal depression and chronic diseases later in life and excessive weight in the post partum period.
