I can understand your concern.
I think you meant what are the days of your cycle in which there are more chances of you being pregnant.
See, the first day of your menstrual bleeding till the 7th day you will be infertile meaning there are very little chances of getting pregnant like 1-2 percent chances that's it.
From day 8 to around day 19 you would be fertile in which the days 11to 16 will be your most fertile days and rest will be semi fertile days.
After day 19 till your next bleeding you will again become infertile.
For more information regarding this, read about safe period on the internet.
Dr. Anil Kumar Jain.
The right time to conceive a baby is after 20 years after pubic bones have matured. It's not safer to conceive after 35years. As the foetus is very prone to malformations. So best age to conceive is 20-35years. After being intimate just avoid prone or supine position. Left lateral is best position when you are pregnant.