To become
pregnant, the complex processes of ovulation and fertilization need to work just right. For some couples, infertility problems can be present from birth (congenital) or something can go wrong along the way that results in infertility.
The reasons for infertility can involve one or both partners. In general:
In about one-third of cases, the cause of infertility involves only the male.In about one-third of cases, the cause of infertility involves only the female.In the remaining cases, the cause of infertility involves both the male and female, or no cause can be identified.
Causes of male infertility may include:
abnormal sperm production due to various problems, such as undescended testicles, genetic defects, health problems including
diabetes, prior infections such as mumps, trauma or prior surgeries on the testicles or inguinal region. Enlarged veins in the testes can increase blood flow and heat, affecting the number and shape of sperm.......problem with delivery of sperm due to sexual problems, such as premature ejaculation, semen entering the bladder instead of emerging through the penis during orgasm (retrograde ejaculation), certain genetic diseases, such as cystic fibrosis, structural problems, such as blockage of the part of the testicle that contains sperm (epididymis), or damage or injury to the reproductive organs. Men who have previously undergone a vasectomy and desire a return of fertility will also need to either have the vasectomy reversed (see 'vasectomy reversal' below) or have sperm retrieved through a surgical procedure for use in assisted reproductive techniques.exposure to chemicals such as pesticides, radiation, tobacco smoke, alcohol, marijuana, and steroids (including
testosterone).
Causes of female infertility may include:
ovulation disorders which hinder or prevent the ovaries from releasing eggs. Examples include hormonal disorders such as polycystic ovary syndrome, a condition that might relate to your ovaries producing too much of the male hormone testosterone, and hyperprolactinemia, when you have too much
prolactin — the hormone that stimulates breast milk production. Other underlying causes may include excessive exercise, eating disorders, injury or tumors.
uterine and cervical abnormalities including problems with the opening of the cervix or cervical mucus, or abnormalities in the shape or cavity of the uterus. Benign tumors in the wall of the uterus that are common in women (uterine fibroids) may rarely cause infertility by blocking the fallopian tubes. More often, fibroids may distort the uterine cavity interfering with implantation of the fertilized egg.
fallopian tubes damage,endometriosis,primary ovarian inefficiency,medical conditions such as hypothyroidism,hyperthyroidism etc
you have gone through important investigations you people need to be screened further...consult good infertility center they will do the needful