Epidemiological analysis of important factors for natural cycles of poor responder women

Since the first tube baby was born in 1978, in vitro fertilization (IVF) treatment offered high pregnancy rates due to improvements in oocyte punction and culture techniques, sperm preparation and oocyte retrieval methods and production of new recombinant stimulating hormones of the ovarian production. However, different disadvantages such as ovarian hyperstimulation, multiple pregnancies, premature birth, expensive and not without risk stimulating protocols, are often involved in IVF cycles. Our purpose was to assess theefficacy of IVF in natural cycles, as an alternative treatment in women with a poor ovarian response in gonadotropin stimulation and to explore the relationship between the important factors that control the natural cycle of women and the positive or negative β-human chorionic gonadotropin (β-HCG). Twenty six women with regular menstrual were offered a total of 37 natural cycles of treatment. One woman had four natural cycles, two women had 3 natural cycles each and 4 women had 2. The women treated were from 29 to 46years old and their mean age was 37,6±4,2 years old. LH surge was observed in 14 cycles (37,8%). In 20 cycles (54%) one oocyte was retrieved and in 2 cycles (5,4%) two oocytes were retrieved