How to know the pregnancy if you do not know the date of the last monthly

The easiest way to set the duration of the pregnancy is possible, based on the date of the last menstruation. However, this is not always possible. Some women there are no calendars and just forget when exactly they had this so-called day, and sometimes pregnancy occurs on the background of complete absence of monthly bleeding. For example, if a nursing mother becomes pregnant in the first menstrual cycle after childbirth.

When necessary, alternative methods of calculating the period

Even if a woman knows the start date of your last bleeding, but her menstrual cycle is characterized by great irregularity, based on the standard method of calculating the duration of pregnancy is impossible. Besides, it may happen that it took for my period light bleeding, occurring with the existing pregnancy. To more accurately determine the date of future delivery, and may even have to resort to less common ways of calculating the pregnancy.

The definition of the term ultrasound

Modern technology can greatly facilitate difficult at first glance task. Manufactured today devices of ultrasonic diagnostics allow up to 1 day to establish the age of a small embryo, but only in case if the pregnancy does not exceed 12 weeks. All the kids prior to this period grow equally, later on the size start to influence features of personal development.

The height of the uterine fundus

If to determine the exact period when ultrasound is not possible, you have to resort to more ancient methods, it is necessary to remember that these are approximate and depend on them should be more than careful.

One of such methods is the definition of height of standing of uterus day. Starting from 16 weeks, the doctor may palpate through the abdominal wall, and if it is, for example, reaches the navel, it is possible to say that the gestation is 22-24 weeks.

Even accurately calculated due date is not absolute and serves only for reference, because a normal pregnancy ranges from 38 to 42 weeks.

Perturbation

The least accurate criteria on which to define the term, are stirring. According to obstetric textbooks nulliparous women begin to feel the first tremors on the 20th week, the more experienced their fellow member at 17-18. But as practice shows, everything is so highly dependent on the sensitivity of women, sometimes even suspicion, the location of attachment of the fetus in the uterus and temperament of the child, some expectant mothers already at 14-15 weeks boasted the first "pinocchi", while others fall into a real panic due to the fact that, at 21-22 weeks of not feeling anything at all.

Sometimes when calculating the period of pregnancy can help date of conception, if known more or less accurately.

Which way is more precise

Therefore, if the monthly date is unknown, you should contact an experienced usesto, only in this case the pregnancy can be calculated more or less accurately. All other methods give more than an approximate version they should be considered only as an auxiliary method.