Conception to Birth About one month before conception almost all adult produce thousands of sperm each second. The number of chromosomes in each sperm produced is half the normal number 23 instead of 46. They take a month or so to travel from a testicle through a long tube. Each sperm counts human DNA but only one complete a set of chromosomes. One day before conception the woman ovulates and produces one mature ovum.
CONCEPTION PHYSICAL Conception is the beginning of human development and happens when the sperm meets an egg. In the first month, the first two weeks will be the embryo attaching itself to the uterine wall. After 25 days, the baby’s body will start to develop (only the head, followed by the trunk and arm buds). The heart will also start beating. By 30 days, the baby will be a quarter of an inch long.
Embryonic Stem Cell Research A stem cell is a type of cell that can give rise to more cells of its kind, with at least one type of specialized cell. Human bodies possess different kinds of stem cells in different stages of life, and embryonic stem cells exist only in the first few weeks of human life, when humans are embryos. Embryos are fertilized eggs formed when a human egg and sperm fuse together and begin to undergo cell division. After about five days from the first division embryos develop into a hollowed-out ball of fluid that contains around 150 cells called a blastocyst. A part of the blastocyst will become the placenta, which will serve to nurture the growing embryo.
For fertilization to take place, sperm must be present either a couple of days prior to or on the day of ovulation. Sperm must first cross the barrier of the cervix, which will be thin and watery if the woman has just ovulated. Once the sperm have traversed the cervical mucus, they travel up the moist lining of the uterus into the Fallopian tubes. Since only one of the Fallopian tubes contains an egg, many sperm travel in the wrong direction. Fewer than 1,000 sperm out of the millions in the semen reach the Fallopian tubes, and only a few dozen actually reach the membrane of the egg.
Physical Development Physical development includes motor skills, co-ordination and the influence of hormones. Infancy ( 0-3) Human development begins after the union of male and female gametes or germ cells during a process known as fertilization (conception). When this happens only half of the fertilised eggs become babies. 3 days after fertilisation the egg is the size of a pin head and becomes embedded in the uterus. Labour begins when a women’s water break, this is the amniotic fluid that protects the baby.
Cognitive development is when an individual first begins to develop the ability to think and understand for themselves. Lifespan Development An individual’s lifespan begins when they are conceived and continues as they develop in the womb for nine months. Once delivered, he or she continues through stages in life. “The science of human development seeks to understand how and why people— all kinds of people, everywhere, of every age—change over time” (Berger, 2011). The six common stages of lifespan development are infancy that is from birth until two years, childhood that is from two until 10 years of age, adolescence that is from 10-20 years of age, early adulthood which is from 20-40 years old, middle age which is from 40-65 years of age, and older age which is from 65 until death.
Joseph Riddle AP Pyschology Chapter 4 Outline 10/23/12 I. Prenatal Development and the Newborn A. Conception * The woman is born with all immature eggs. Only 1 out of 5,000 eggs will ever be mature enough to be released * Men can produce up to 1,000 sperm per second, but the rate gradually decreases over time. * As soon as one sperm tries to penetrate an egg, the egg blocks out all others. * Fingerlike projections will sprout around the sperm and fill it in * Fuse later B. Prenatal Development * Zygotes are fertilized eggs * First week – cell divides and makes around 100 cells * Will specialize in structure and function * 9 weeks – embryo is a fetus * 6 months – organs will be able
About 11,000 women will be diagnosed with cervical cancer and 3600 will die. (Atkinson) Cervical Cancer is cancer of the cervix, the lower narrow part of the uterus. The uterus is hollow, pear-shaped organ where a baby grows during a women’s pregnancy. (Facts) Morton 2 Merck began marketing Gardasil in 2006 after the Food and Drug Administration approved it for females ages 9 to 26. The vaccine is the first of its kind to build immunity against two strains of HPV, which lead to 70% of cervical cancer cases in the United States.
Consequently, they mate and touch one another regularly. It takes many years for chimpanzees to reach sexual maturity, and when they do, they begin to exhibit mating behavior. A female is able to mate about every 34 to 36 days. When a female chimpanzee is ready to mate, the skin around her bottom swells and turns pink. The swelling will be there for about ten days before becoming flabby and then shrinking away again.
When the fetal heart rate decreased (Bradycardia), fetal distress was noted, and an emergency caesarean was initiated. To her sadness, the baby was found bluish in skin colour when born in her 35th week gestation in labour with a low birth weight of only 1.4kilogramms. Some abnormality was also found in the baby’s leg. The doctor warned of 50% chance of survival and presence of special child characteristics. Postnatal The born baby was put in the incubator for 2 months.