The necessary requirements for conception to occur are the following:

• The fallopian tubes must be unobstructed and functional to receive the egg from the ovary and allow it to meet with the sperm.
• The sperm must have normal parameters of concentration, forward motility and viability to be able to reach the egg overcoming all the natural hurdles they meet in the way.
• The passing of the sperm from the vagina to the fallopian tubes must be smooth with a friendly environment from the cervical mucus.
• Ovulation must occur so that a mature egg is released from the follicle.
• Sexual intercourse must take place during the fertile days.

It is known that:

• Endometriosis significantly reduces fertility.
• 25-30% of infertility cases are unexplained.