Obstetrics and gynecology. Signs of fetal maturity, size of the head and body of a mature fetus (the most important)

Lecture notes, cheat sheets
Free library / Directory / Lecture notes, cheat sheets

Obstetrics and gynecology. Signs of fetal maturity, size of the head and body of a mature fetus (the most important)

Lecture notes, cheat sheets

Directory / Lecture notes, cheat sheets

Comments on the article

Table of contents (expand)

8. Signs of fetal maturity, dimensions of the head and body of a mature fetus

The length (height) of a mature full-term newborn ranges from 46 to 52 cm or more, averaging 50 cm. The average body weight of a mature full-term newborn is 3400-3500 g. A mature full-term newborn has a well-developed subcutaneous fat layer; skin pink, elastic; the vellus cover is not pronounced, the length of the hair on the head reaches 2 cm; ear and nasal cartilages are elastic; nails are dense, protruding beyond the edges of the fingers. The umbilical ring is located in the middle of the distance between the womb and the xiphoid process. In boys, the testicles are descended into the scrotum. In girls, the small labia are covered with large ones. The cry of a child is loud. Muscle tone and movements of sufficient strength. The sucking reflex is well expressed.

The main feature of the cranial part of the head is that its bones are connected by fibrous membranes - sutures. In the area of \uXNUMXb\uXNUMXbthe connection of the seams there are fontanelles - wide areas of connective tissue. A large head can change its shape and volume, as the sutures and fontanelles allow the bones of the skull to overlap each other. Due to this plasticity, the head adapts to the mother's birth canal. The most important sutures connecting the bones of the fetal skull are the following: the sagittal suture, passing between the two parietal bones; frontal suture - between two frontal bones; coronal suture - between the frontal and parietal bone; lambdoid (occipital) suture - between the occipital and parietal bones. Among the fontanelles on the head of the fetus, large and small fontanelles are of practical importance. The large (anterior) fontanel is diamond-shaped and is located at the junction of the sagittal, frontal, and coronal sutures. The small (posterior) fontanel has a triangular shape and is a small depression in which the sagittal and lambdoid sutures converge.

Head full-term mature fetus has the following dimensions:

1) direct size (from the bridge of the nose to the occiput) - 12 cm, head circumference in direct size - 34 cm;

2) large oblique size (from the chin to the occiput) - 13-13,5 cm; head circumference - 38-42 cm;

3) small oblique size (from the suboccipital fossa to the anterior angle of the large fontanel) - 9,5 cm, head circumference - 32 cm;

4) average oblique size (from the suboccipital fossa to the border of the scalp of the forehead) - 10 cm; head circumference - 33 cm;

5) sheer, or vertical, size (from the top of the crown to the sublingual region) - 9,5-10 cm, head circumference - 32 cm;

6) large transverse size (the largest distance between the parietal tubercles) - 9,5 cm;

7) small transverse dimension (distance between the most distant points of the coronal suture) - 8 cm.

dimensions torso fruit are as follows:

1) the size of the shoulders (diameter of the shoulder girdle) - 12 cm, the circumference of the shoulder girdle - 35 cm;

2) the transverse size of the buttocks is 9 cm, the circumference is 28 cm.

Author: Ivanov A.I.

<< Back: Diagnosis of pregnancy

>> Forward: Examination of a woman in labor

We recommend interesting articles Section Lecture notes, cheat sheets:

▪ Ethics. Lecture notes

▪ Psychology of work. Crib

▪ Innovation management. Crib

See other articles Section Lecture notes, cheat sheets.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

The existence of an entropy rule for quantum entanglement has been proven 09.05.2024

Quantum mechanics continues to amaze us with its mysterious phenomena and unexpected discoveries. Recently, Bartosz Regula from the RIKEN Center for Quantum Computing and Ludovico Lamy from the University of Amsterdam presented a new discovery that concerns quantum entanglement and its relation to entropy. Quantum entanglement plays an important role in modern quantum information science and technology. However, the complexity of its structure makes understanding and managing it challenging. Regulus and Lamy's discovery shows that quantum entanglement follows an entropy rule similar to that for classical systems. This discovery opens new perspectives in the field of quantum information science and technology, deepening our understanding of quantum entanglement and its connection to thermodynamics. The results of the study indicate the possibility of reversibility of entanglement transformations, which could greatly simplify their use in various quantum technologies. Opening a new rule ... >>

Mini air conditioner Sony Reon Pocket 5 09.05.2024

Summer is a time for relaxation and travel, but often the heat can turn this time into an unbearable torment. Meet a new product from Sony - the Reon Pocket 5 mini-air conditioner, which promises to make summer more comfortable for its users. Sony has introduced a unique device - the Reon Pocket 5 mini-conditioner, which provides body cooling on hot days. With it, users can enjoy coolness anytime, anywhere by simply wearing it around their neck. This mini air conditioner is equipped with automatic adjustment of operating modes, as well as temperature and humidity sensors. Thanks to innovative technologies, Reon Pocket 5 adjusts its operation depending on the user's activity and environmental conditions. Users can easily adjust the temperature using a dedicated mobile app connected via Bluetooth. Additionally, specially designed T-shirts and shorts are available for convenience, to which a mini air conditioner can be attached. The device can oh ... >>

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

Random news from the Archive

Sony IMX224MQV image sensor with record-breaking light sensitivity 24.10.2014

Sony introduced the IMX224MQV image sensor for automotive cameras. The Sony IMX224MQV 1/3-inch CMOS image sensor has a resolution of 1,27 MP. According to the manufacturer, it has a record high light sensitivity in its category and allows you to shoot in almost complete darkness.

To obtain a color image, an illumination of 0,005 lux is sufficient. For example: on a full moon in a clear sky, the illumination is 0,25-0,3 lux, and the stars on a moonless night create an illumination of 0,01 lux. In other words, the new sensor allows you to shoot in almost complete darkness. In addition, the IMX224MQV is Sony's first mass-produced sensor to meet reliability requirements for automotive electronics (AEC-Q100 test).

Sensor resolution - 1305 x 977 pixels. Pixel size - 3,75 x 3,75 microns. The diagonal sensor size is 6,09 mm. In full resolution, the sensor is capable of producing an image in 10-bit representation at a frequency of 120 fps, in 12-bit - at a frequency of 60 fps.

The sensor is housed in a 9,0 x 7,5 mm BGA package with 72 pins.

Other interesting news:

▪ Evening coffee knocks down the biological clock

▪ Invisibility Cloak Illusion

▪ Images are projected onto clean air

▪ Processing carbon dioxide into rocket fuel

▪ Huawei Smart Life Air Purifier 1Pro

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Electrician's tool. Article selection

▪ article I don't know why and who needs it. Popular expression

▪ article Can I make my own weather forecasts? Detailed answer

▪ article Following to the place of work and back. Standard instruction on labor protection

▪ article Guiding a mat on glass. Simple recipes and tips

▪ article Transistors IRFL014 - IRFP264. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews