Conception is process which from fertilization of egg into fallopian tube to implantation of fertilised egg into woman’s uterus. This process can be typically divided into 3 sub-processes as given below.
Ovulation –> Fertilisation –> Implantation
When an egg is released from one of the ovaries to one of the fallopian tube, this time is known as ovulation period and during this time time women conceives.
During sex, sperm are ejaculated from a man’s penis into a woman’s vagina. In one ejaculation there may be more than 300 million sperm. Most of the sperm leak out of the vagina but some begin to swim up through the cervix. When a woman is ovulating, the mucus in the cervix is thinner than usual to let sperm pass through more easily. Sperm swim into the uterus and into the fallopian tubes. Fertilisation takes place if a sperm joins with an egg and fertilises it.
During the week after fertilisation, the fertilised egg changed into embryo moves slowly down the fallopian tube and then into the uterus. The embryo attaches itself firmly to the specially thickened uterus lining. This is called implantation. Hormones released by the embryonic tissue prevent the uterus lining from being shed. This is why women miss their periods when they are pregnant.