The ovaries produce the female egg cells, called the ova or oocytes. The oocytes are then transported to the fallopian tube where fertilization by a sperm may occur. The fertilized egg then moves to the uterus, where the uterine lining has thickened in response to the normal hormones of the reproductive cycle.
simply telling them the truth is better than lying try to be gentle and not cruel with your words for example : I don't feel the same way about you I'm sorry (if you like someone just tell them )