Question

In which technique fertilization occur inside the woman's body?

Answer 1

Answer:

In vitro fertilization (IVF) occurs inside the woman's body.

Explanation:

• In vitro fertilization (IVF) exists as the joining of a woman's egg and a man's sperm in a laboratory dish. In vitro indicates outside the body. Fertilization represents the sperm has connected to and entered the egg.
• In vitro fertilization (IVF) is a complicated series of procedures used to support fertility or control genetic issues and assist with the conception of a child.
• IVF stands for in vitro fertilization. It’s one of the more widely known kinds of helped reproductive technology (ART). IVF works by utilizing a mixture of medicines and surgical procedures to allow sperm to fertilize an egg, and help the fertilized egg implant in your uterus.

Therefore, In vitro fertilization (IVF) occur inside the woman's body.

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Answer 2

Fertilization is a process of fusion of two gametes to form a zygote. Fertilization consists of four different parts:

• Contact and recognition between sperm  and egg.
• The next step is entry of a sperm into a egg. Only one sperm nucleus can unite with the egg nucleus. To ensure this only one sperm is allowed to enter the egg.
• In the next step the egg nucleus fuses with the sperm nucleus.
• Finally the egg is activated to start development.

Once a sperm enters inside an woman's body the entire process of fertilization takes place inside the woman's body.

As soon as a sperm finds an egg it fuses with the egg plasma membrane. However the sperm must be first made competent to fertilize the egg. This increases motility of the sperm and makes it capable of undergoing acrosome reaction. It involves the removal of cholesterol from cell membrane by albumin proteins.

The sperm must penetrate the egg's zona pellucida to enter the egg which is done by the acrosome reaction where a variety of proteases lyse the zona pellucida. These enzymes make a hole in the zona pellucida through which a perm enters the egg. It also alters the sperm surface so that it can fuse with the plasma membrane of the egg.

After fusion all the sperm contents are drawn into the egg. This triggers meiosis, which was arrested in metaphase II, resumes. This produces a second polar body, and a zygote, which begins to develop.

The fusion of the egg plasma membrane with the first sperm hinders the other sperms from fusing.

Next the two haploid pronuclei-one from egg, the other from the sperm will fuse together. However in mammals the two pronuclei do not fuse directly but approach each other but remain distinct until the membrane of each pronucleus has broken down for the zygote's first meotic division.