What are the reasons why women have difficulty getting pregnant?

There are various reasons why women may have difficulty becoming pregnant, which can be mainly summarized as follows:

1. Ovulation disorders: One of the primary causes of infertility, including conditions such as polycystic ovary syndrome (PCOS) and diminished ovarian reserve, which affect the normal development and release of eggs.
2. Tubal factors: Inflammation, adhesions, or blockages in the fallopian tubes can prevent the sperm from meeting the egg.
3. Uterine developmental issues: Congenital abnormalities such as uterine septum or unicornuate uterus can interfere with implantation and pregnancy.
4. Hormonal imbalances: Endocrine disorders may lead to anovulation or irregular ovulation, thereby affecting fertility. For example, excessive androgen production can prevent ovulation, while low estrogen levels may result in a thin endometrium, which is unfavorable for embryo implantation.
5. Immunological factors: The presence of antisperm antibodies or anti-endometrial antibodies in a woman's body can contribute to immunological infertility, affecting conception.
6. Disease-related factors: Conditions such as endometriosis, uterine fibroids, or adenomyosis can interfere with embryo implantation, while cervicitis or cervical erosion may hinder sperm entry into the uterine cavity.