Again, this is simply an old wives tale and has no scientific backing.

By one year a baby would have developed preference for adults, toys, and books they are accustomed to. They may show preference to these people or items, and may not be interested in accepting someone or something else as a replacement.

Getting enough iron prevents anemia, which is linked to preterm birth and low-birth weight babies.

Pregnancy tests are designed to tell if your urine or blood contains a hormone called human chorionic gonadotropin (hCG). This hormone is produced right after a fertilized egg attaches to the wall of a woman's uterus.

Some men have an immune reaction to semen, which causes them to produce anti-sperm antibodies that damage their sperm.

Hyperprolactinemia causes infertility in around 11% of oligospermic males. Hyperprolactinemia also directly influences spermatogenesis and steroidogenesis by acting on prolactin receptors present in Sertoli cells and Leydig cells in testes, and produces primary hypogonadism and infertility.