To identify the father of the child can be expected date of pregnancy. To do this, remember when you last menstruated. If you are calendars, where carefully note the onset of menstruation – excellent, this will help you to set the exact date.
To determine the date of conception of the child, you need to know the length of your cycle. For most women, this period is 28 days but it can last from 21 to 35 days. At the time of ovulation from the ovary enters the Mature egg, ready for fertilization. This usually occurs at 14-15 days after the onset of menstruation. Girls with irregular cycle this term need to calculate individually. Ovulation is an opportune time for conception. However, you should consider the viability of spermatozoa in the female tract, and also the fact that conception may occur not only on the day of ovulation, but two or three days later. Total pregnancy is between six to nine days. Dangerous period starts three days before ovulation. If at this time you had contact with only one man, he is the father.
A more accurate age of the fetus will tell you at the ultrasound. To do it makes sense, in a period of ten weeks. The doctor will tell you how many weeks the foetus, and you can determine the day of conception.
To most accurately determine who is the child's father using the DNA test. It does not need to wait for the birth of the baby. The necessary genetic material the doctor will take out some amniotic fluid. Also to study the need and the DNA of the alleged fathers of the child. After the detection of the matching genes will tell you who of the men will be a dad. Such a diagnosis can be carried out already in the ninth week of pregnancy.