Researchers at the Swedish medical university Karolinska Institutet have been able to describe the 3D structure of a complete egg receptor that binds sperm at the beginning of fertilization. The results, published in the journal Cell , will lead to better understanding of infertility and may enable entirely new types of contraceptives. For centuries, the imagination of people has been grasped by the encounter of gametes -- egg and sperm-, whose union gives rise to a new individual. At the beginning of conception, sperm binds to proteins in the extracellular coat of the egg, called zona pellucida ZP. But the molecular details of this fundamental biological event have so far remained obscure.
Egg meets sperm
Egg meets sperm (article) | Embryology | Khan Academy
The moment when sperm meets egg is known as conception. A sperm can take anywhere between 45 minutes to 12 hours to reach the fallopian tubes area where conception occurs. However, sperm can survive for more than six days in your body. There are a few basic lessons you need to understand before you grasp what occurs when a sperm meets egg. Every girl child is born with over a million eggs in their ovaries. These eggs begin to die as you grow older.
How does an egg meet a sperm?
Fertilization , the meeting of the sperm and egg in the physical process called human reproduction , can happen when two humans of the opposite sex one male and one female have unprotected sexual intercourse. The male's sperm is released through his penis and enters the female's vagina. The sperm travel from the vagina to the womb uterus through the cervix opening from the vagina to the uterus by "swimming," and try to find an egg. If there is an egg deposited by the ovary waiting there in the uterus or on its way from the ovary to the womb in the ovarian tubes, called Fallopian tubes , the sperm connect with it and the combining of the egg and the sperm is what fertilizes the egg.
The ultimate goal of sperm is to fertilize the egg. However, to meet the egg cell, the sperm has to go through a long and tedious path. After they meet, many people wonder what's next, how long will it take for implantation to occur and for the woman to get pregnant. This article aims to clarify these doubts in detail.