First your keyword must appear in the title. Then it must appear in the URL. Then you should spread all H1,H2,H3 tags in your article. Your Keyword should appear in your first paragraph and in the last sentence of the page.
There are only a few days in each monthly cycle when a woman is fertile and able to get pregnant. You only get a baby when a sperm meets an egg and an egg usually only comes along once a month ovulation. This egg survives for just one or two days. So, there is a small time each month when you can actually get pregnant.