Why it is impossible to become pregnant during monthly

It is considered that to conceive the child during monthly it is impossible. From where does the great number of mummies claiming that they became pregnant exactly thanks to sex in "safe days" undertake then?

To explain why it is impossible to become pregnant in time monthly, from the theoretical point of view pretty easily. Ideally, the ovulation — the most favorable period for pregnancy emergence — comes at women in the middle of a menstrual cycle, i.e. approximately in 2 weeks after the beginning previous monthly and in 2 weeks prior to the beginning of the subsequent periods. Men's spermatozoa, as a rule, keep the activity within only one week after hit in the woman's vagina. Here also it turns out what it is impossible to become pregnant during monthly. But, as we know, each rule has the exceptions. And actually the probability of approach of pregnancy during monthly exists. Chances to become pregnant during monthly increase at the women leading irregular sex life which leads to violation of physiological processes of a reproductive system. During monthly can be the cause of approach of pregnancy as well such unusual occurrence as maturing of two ova. The irregular menstrual cycle and its sharp change lead, as a rule, to shift of terms of an ovulation. And it can also lead to approach of pregnancy during monthly. Remember that it is possible to become pregnant nevertheless not in any day of periods. Several first days monthly are followed by plentiful allocations which have very much negative effect on activity of the spermatozoa getting into a vagina of the woman and even men's gametes kill. And consequently, the probability to become pregnant exists only in the last days of monthly in which directly and there has to be an exit of not impregnated ovum. Thus, it turns out what to become pregnant during monthly, to be exact their last days, nevertheless it is possible.