Hi and welcome to Healthcaremagic. I understand your concerns. Yes, it is very possible to be pregnant at the age of 40 and even more than this. A woman can be pregnant with 45 if her periods are srill regular and there is ovulation with healthy eggs production. The exact time of menopause vary form woman to woman and only when menopause occurs then there is no more possibility of being pregnant. Also, there are no specific limits for a man regarding to age for fertilization. here is slightly increased risk for pregnancy problems if woman is older than 45 so pregnancy should be closely followed if it happens. I hope I have answered you query Kindly regards. Wish you a good health.