Prevalence of<unk>  varies depending on the definition, i.e. on the time span involved in the failure to conceive.<unk>  rates have increased by 4% since the 1980s, mostly from problems with fecundity due to an increase in age. *Fertility problems affect one in seven couples in the UK. Most couples (about 84%) who have regular sexual intercourse (that is, every two to three days) and who do not use contraception get pregnant within a year. About 92 out of 100 couples who are trying to get pregnant do so within two years. * Women become less fertile as they get older. For women aged 35, about 94% who have regular unprotected sexual intercourse get pregnant after three years of trying. For women aged 38, however, only about 77%. The effect of age upon men's fertility is less clear. * In people going forward for IVF in the UK, roughly half of fertility problems with a diagnosed cause are due to problems with the man, and about half due to problems with the woman. However, about one in five cases of<unk>  have no clear diagnosed cause. *In Britain, male factor<unk>  accounts for 25% of infertile couples, while 25% remain unexplained. 50% are female causes with 25% being due to anovulation and 25% tubal problems/other. *In Sweden, approximately 10% of couples wanting children are infertile. In approximately one-third of these cases the man is the factor, in one third the woman is the factor, and in the remaining third the<unk>  is a product of factors on both parts.
Infertility
Oncofertility
Male infertility
Female infertility
Precocious puberty
Ejaculation disorders
Salpingitis
Lactational amenorrhea