You will need
- measuring tape;
- - ultra-sound study
Genetic factor is one of the most important parameters determining the growth of the child. As a rule, growth in boys is due to the growth of the father or next of kin in the male line (uncles, grandparents) and the growth of girls is due to the growth of the mother and the relatives on the maternal line.
Contact your gynecologist. Parameters which can determine fetal growth: placental and obstetric estimates. If pregnancy occurs the disruption of the placenta, the fetus may develop hypoxia (oxygen starvation), leading to reduced growth and fruit development.
When visiting the gynecologist a pregnant woman using a measuring tape and make measurements of abdominal circumference and height of standing of bottom of uterus. Midwives in determining fruit size (large, small, normal) using several formulas, including: abdominal circumference (cm) multiplied by the height of standing of bottom of uterus (cm). However, the above formula is considered to be the easiest, but not the most accurate since it does not take into account the thickness of subcutaneous fat in pregnant women.
Contact the experts for carrying out an ultrasound. Using ultrasound to determine fetal size by measuring several parameters: kopchik-parietal (set to the date of the last menstrual period), bi-parietal (size between the right and left sides of the head), hip length (measurement of the longest bone of the body – the femur – reflects the length of the fruit, the length of the thigh, you can determine the duration of pregnancy), etc., if necessary, the doctor will conduct additional measurements.
Advice 2: How to determine the size of the bike
Not so often, buying a bike, people pay attention to the size of his frame. And for good reason. If the frame is big you do not fit, you will ride on it without pleasure. You will only izakayas, and then get injured.
All models of bikes have a unique bike. Sizes from 16-inch to 24-inch are more common than others. But there are manufacturers who like to produce frames with polzuemoy step (for example, of 16.5). Many people think that the distance from the axis of the BB to tip of seat tube is the frame size. And in fact, it often goes like this option the different manufacturers. For example, 18-inch frame one manufacturer may not be identical to the 18-inch frame from another plant.
When you purchase or intend to purchase a Bicycle, be sure to measure the distance from the groin to the top of the pipe. Let it be not less than 8-10cm. For it is made to in the case of a sharp brake and a simultaneous jump of the bike you didn't get hurt. If you're not going to scorch, and will ride quietly, can this recommendation be disregarded. But still to buy a bike with the aforesaid distance is less than 5cm is not recommended to anyone.
On the model that you like, pay attention to fit. The fit should be as comfortable as possible. You do not want ever to be tired and drive at low speed? And that's the main drawback of mismatched landing.
Carefully examine the saddle. Adjust it the right height so that your leg while driving, causing the pedal in the lowest position, straightened fully. If not rectified, it is necessary to purchase a larger size saddle.
Make sure that the drive you safely and effortlessly reach the wheel. Suppose you do not want even a little move back or bend forward even more. Otherwise, then can start back pain due to unhealthy situation.
Let's say you want to order a bike via the Internet. No need to hurry. It is better to first go to a regular store, find your favorite model. Follow all the recommendations given above. Ride on this bike and only then order. Otherwise it may happen that the purchased model does not suit you and instead of enjoyment have to suffer the hurt and discomfort.
If you choose a Bicycle for aggressive city riding, you'll like BMX. Since the bike is designed for "standard" person, to achieve the best fit in each specific case it is necessary to choose the position of the steering wheel and the seat, and sometimes replace them with more suitable ones.
Is the advice useful?
Potential buyers who do not know how to choose size of bike, it is best to contact the specialized stores, since various modifications size the seat tube is provided in different units. The choice of bike growth is always linked with the wheel diameter indicated in the technical specifications of the bike in inches. If the diameter of a Bicycle wheel are numbered from 10" to 24", before the buyer's bike.
In addition to the genetic factors, on the size of the fetus affects the nutrition of the future mother, the presence of diabetes, the insufficient production of thyroid hormones, delayed pregnancy, fetoplacental insufficiency, syndrome of intrauterine delay development of the fetus, bad habits and chronic diseases of the mother and her age (if she is less than 15 years).
If a pregnant woman has a big belly, it is not necessary that she will have a big baby. It is possible that a large abdomen due to obesity or pregnant women have polyhydramnios.