All future parents are concerned by a question of date of appearance of the kid on light. Someone plans it in advance. There are several ways to calculate day of appearance of the child. In clinic for women the obstetrician makes several calculations (on day of the last periods, by results of ultrasonography, on the first stir of a fruit and by date of conception). You can independently learn estimated date. But it is important to remember that all calculations are approximate and precisely you will not manage to learn a birthday.
It is required to you
- - calendar of a menstrual cycle
Instruction
1. If you plan the births of the kid for a certain time (for example in the middle of January), then you can be helped by a method of definition of date of childbirth by date of conception. Process this labor-consuming and difficult, but is not present anything impossible. It is possible to learn approximately a birthday, but you should remember that this date is approximate. For the correct calculations of van it is necessary to keep a diary of menstrual cycles not less, than in six months. It is important to celebrate the first day of periods and how many days it proceeds.
2. Further count each menstrual cycle (from the first day of the previous periods to first day of the subsequent). So we receive six figures for the last six months (it is possible to take also value in a year). Summarize all cycles and divide the received figure into six. Receive an intermediate-term cycle. You are interested in calculation of time of an ovulation, it is the first day in which fertilization is possible. The ovum leaves their follicle and gets to a fallopiyeva a pipe (exactly there has to be a connection of a spermatozoon and an ovum). The ovulation comes in the middle of a cycle therefore divide the received figure into 2.
3. As cycles differ in the number of days a little, and the ovulation varies therefore to the middle of a cycle add for two days in both parties. It is also safe days for conception of the kid. It is worth remembering that spermatozoa can live in pipes from two to seven days therefore the first attempt should be made for couple of days before estimated date of an ovulation. It is simple to define a birthday, it is necessary to apply a formula Negele, for this purpose of the first day of the last periods take away three months and add seven days. Also a little in a different way is possible: add to date of the first day of the last periods nine months and seven days.
4. The method given above is suitable only for the women having a stable menstrual cycle. If you have a hormonal imbalance or a big difference in menstrual cycles, then you should use other ways.