Getting pregnant. Pregnancy happens when a man's sperm fertilises a woman's egg, which can happen even if you've not had sexual intercourse (penetration). During sex, semen is ejaculated from the man's penis into the woman's vagina.
People also ask, how does a pregnancy start?
The development of pregnancy is counted from the first day of the woman's last normal menstrual period (LMP), even though the development of the fetus does not begin until conception, which is about two weeks later. Counting from the LMP, most women are pregnant an average of 280 days.
How does pregnancy occur in human?
If a sperm cell does join up with your egg, the fertilized egg moves down the fallopian tube toward the uterus. If the ball of cells attaches to the lining of your uterus, it's called implantation — when pregnancy officially begins.
What causes you to get pregnant?
No one knows for sure why it happens, but it might be caused by the fertilized egg settling into the lining of your uterus. Note: About 1 in 4 women experience spotting or light bleeding during the first trimester. It's often nothing, but sometimes it's a sign of miscarriage or ectopic pregnancy.