unit 4 - p1 Development from conception onwards

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The Life Stages

0-3 years is Tommy

4-9 years is Amy

10-18 years is Abbey

19-65 years is Denise/Jack

65+ years is Pat

The human life span is set in age stages; these are called Life Stages. The stages are listed from 0-3 years to 65+ years. Growth is a term used within describing the life stages because it’s a term to describe an increase in quantity. For example, as children grow the height and weight increases. We also use the term development; this describes the development of someone’s abilities, as they grow older. We can also use this term to describe the development of quantity change, such as height and weight. Also describing the lift stages, we use the term called maturation. This is different to development and growth. Puberty is an example of maturation because when development is expected to be due to a genetically automated sequence of change. Development norms, is another term we use to describe a set of average expectations to an infants or child’s development. Holistic development is similar but instead its describing someone’s physical, emotional, intellectual and social development in one.

Conception & pregnancy

A human baby’s life begins at conception. A woman usually develops 1 egg per month, roughly this happens 2 weeks after her last period. A women is most likely to get pregnant within a day or so of ovulation. An egg lives for about 12-24 hours after its released. For a woman to actually get pregnant the egg needs to be fertilized by a sperm cell within this time.

Pregnancy is divided into 3 trimesters. Each trimester is a little longer than 13 weeks. The first month marks the beginning of the first trimester.

1, 2 and 3 weeks

The egg is fertilized in one of the fallopian tubes and is carried into the uterus. Fertilization of the egg happens in the fallopian tube. As the egg passes through the fallopian tube is sets itself in the wall of the uterus.

The embryo becomes a shape of a pear with a head shaped rounded, pointed lower spine and notochord running along its back.

4- 5 weeks

The embryo becomes C-shaped and a tail is visible. The umbilical cord forms and the forebrain enlarge; at this stage of pregnancy the internal organs a begun to form. During this stage of development, the embryo is vulnerable to harmful substances consumed by the mother, which may cause defects.

6-8 weeks

The eyes, mouth, nose and ears have begun to form and the limbs grow rapidly from tiny buds.

The head and face has formed more human, the head is more upright, and the tail has gone. Legs and arms have developed. Fingers and toes have formed.

9-10 weeks

  • The embryo develops into a fetus after 10 weeks.
  • Fingers and toes are longer.

The umbilical cord connects the abdomen of the fetus to the placenta.  The placenta is attached to the wall of the uterus. It absorbs nutrients from the woman’s bloodstream. The cord carries nutrients and oxygen to the fetus and takes wastes away from the fetus.

11-12 weeks

The fetus is now measured from the top of its head to its buttocks. This is called crown-rump length. The fetus has a CRL of 2–3 inches. Its Fingers and toes are no longer webbed whilst the Bones begin hardening. Skin and fingernails begin to grow. Changes triggered by hormones begin to make external sex organs appear — female or male. The fetus begins making spontaneous movements. Kidneys start making urine, Early sweat glands appear and Eyelids are fused together.

13-14 weeks (second trimester)

The baby has a CRL of about 3 inches long which is about 8 cm long at this stage. The sex of the fetus can sometimes be seen on the ultra sound of the mothers scan. Hair begins to grow on the babys head and the roof of the baby’s mouth is formed, whilst the prostate glands are developing on the male. Ovaries move down from the abdomen to the pelvic area in the female.

15-16 weeks

Some of the early signs and symptoms of pregnancy begin to be relieved during the fourth month for example Nausea is usually reduced. But other digestive problems — heartburn and constipation — may be still occurring. Breast changes — growth, soreness, and darkening of the areola — usually continue. It’s common for women to have shortness of breath or to breathe faster. Increased blood flow may lead to unpleasant pregnancy symptoms, such as bleeding gums, nosebleeds, or nasal stuffiness. Pregnant women also may feel dizzy or faint because of the changes to their blood and blood vessels.

17-20 weeks

The fetus has CRL of about 6.5 inches long which is 16cm long. The fine downy hair begins to cover the body, which is called Lanugo. The skin is also covered with Vernix Caseosa, which is a greasy material that covers the body. The uterus now has developed into either a male or female. Women usually feel faint movements for the first time during the fifth month. It may feel like flutters or butterflies in the stomach.

The pregnancy symptoms of the fourth month continue into the 5th month- Heartburn, constipation, breast changes, dizziness, shortness of breath, nosebleeds, and gum bleeding are common. Breasts may be as much as 2 cup sizes bigger by this time.

21-24 months

The baby now has a CRL of about 7 inches, which is about 18-19 cm long. The bone marrow now starts to develop blood cells and taste buds start to form. Pregnancy symptoms from the fourth and fifth month usually continue. Shortness of breath may improve. Breasts may start producing colostrum — tiny drops of early milk. This may continue throughout pregnancy.

Some women have Braxton-Hicks contractions. They feel like a painless squeezing of the uterus or abdomen. This is the uterus’s way of practicing for labor and delivery. Braxton-Hicks contractions are normal and not a sign of preterm labor. But women should check with their health care providers if they have painful or frequent contractions or if they have any concerns.

Weeks 25–26

The baby has now got a CRL of about 9 inches long which is roughly 23 inches long. Also the baby develops more and more fat from now until end of pregnancy.

  • Week 27–28

The baby now has a CRL of about 10 inches which is 25 cm long. Eyelids are usually fused together until 28 weeks.

A woman’s uterus continues expanding. Back pain is common. Pregnancy symptoms from earlier months continue. Dizziness may lessen.

                

  • 29-30 weeks (third trimester)
  • The fetus has a CRL of about 10.5 inches (27 cm).

Testes usually begin descending into the scrotum from the abdomen between weeks 30 and 34 in a male fetus. This is usually complete by 40 weeks.

Week 31–32

  • The fetus has a CRL of about 11 inches (28 cm).

Lanugo starts falling off.

 Women often start feeling tired and have a more difficult time breathing as the uterus expands up. They may get varicose veins — blue or red swollen veins most often in the legs — or hemorrhoids — varicose veins of the rectum. Hemorrhoids can be painful and itchy and cause bleeding. Women may also get stretch marks where skin has been expanded. Braxton-Hicks contractions, heartburn, and constipation may continue. Women may urinate a bit when sneezing or laughing because of pressure from the uterus on the bladder. Hormones may make hair appear fuller and healthier.

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Weeks 33-36

  • The fetus has a CRL of about 12 inches (30 cm).

The eyes have developed enough for pupils to constrict and dilate when exposed to light.

  • Lanugo is nearly all gone. The fetus is considerably fatter, and the
  • Skin is no longer wrinkled.

37-40 weeks

  • The fetus has a CRL of about 13–14 inches (34–36 cm).
  • The fetus has a firm grasp.  Many women give birth around this
  • Time. The average new born weighs around 7-8lbs which is
  • Around 18-22 inches long with legs extended.

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