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Abnormal Uterine Bleeding in the Adolescent Patient
Abnormal Uterine Bleeding in the Adolescent Patient

... months. She states that her periods started at age 13, and after her first period she did not have another menses for 3 months. After her second menstrual cycle, her periods started “happening all the time.” She notes that menses sometimes come once a month, sometimes “skip a month,” and lately have ...
Endocrine System
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The Endocrine System
The Endocrine System

... lutropin. In females, an acute rise of LH ("LH surge") triggers ovulation and development of the corpus luteum. In males, it stimulates Leydig cell production of testosterone. It acts synergistically with FSH. • Prolactin(PRL): stimulates the mammary glands to produce milk (lactation), counteracts t ...
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Perimenopausal Bleeding - Medical College of Wisconsin
Perimenopausal Bleeding - Medical College of Wisconsin

... is of normal caliber measuring 3 mm. Within the uterine myometrium, there is a solid right-sided myometrial mass measuring up to 4.7 cm in diameter consistent with a uterine fibroid. The right and left adnexa are identified. A 1 cm simple-appearing cyst is noted in the right adnexa. Blood flow is no ...
The Endocrine System
The Endocrine System

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Endocrine System
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Hirsutism and Polycystic Ovary Syndrome (PCOS)
Hirsutism and Polycystic Ovary Syndrome (PCOS)

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ENDOMETRIOSIS - Dr Nayan Sarkar`s Blog
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General Adaptation Syndrome – Internet Assignment

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Chapter 16: Endocrine System
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FINAL EXAMINATION hormone

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Endocrine System Facts Review
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... There are two of theses. They sit on top of each kidney, like a cap. This hormone increases heart rate, blood pressure, and causes vasodilation of blood vessels in the heart and respiratory system. It also stimulates the liver to break down stored glycogen into glucose and release it into the bloods ...
infertility - Annammal College of Nursing
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... Dose schedule starts with a minimal dose of 75 IU IM/day. Follicular stimulation is started at any time from 2-5 days of the cycle and is continued for 7-10 days depending on the response. Follicular growth is monitored with serum estradiol estimation and follicular number and size are measured b ...
Endocrine Glands and Hormones
Endocrine Glands and Hormones

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The Climacteric
The Climacteric

... degenerate. It has been estimated that of the 6 million oogonia present in the fetal ovaries at 20 weeks' gestation, only 700,000 to 2 million will form primordial follicles. Thus the human female has a variable but finite number of primordial follicles. The primordial follicles present at birth ar ...
Human Endocrine System
Human Endocrine System

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Nervous co-ordination gives control. Endocrine co
Nervous co-ordination gives control. Endocrine co

... The two systems interact in a dynamic way in order to maintain the constancy of the animal's internal environment, while permitting changes in response to a varying external environment. Both systems secrete chemicals, the nervous system as a transmitter between neurones and the endocrine system as ...
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Menstrual cycle



The menstrual cycle is the regular natural changes that occurs in the uterus and ovaries that make pregnancy possible. The cycle is required for the production of ovocytes, and for the preparation of the uterus for pregnancy. Up to 80% of women report having some symptoms during the one to two weeks prior to menstruation. Common symptoms include acne, tender breasts, bloating, feeling tired, irritability, and mood changes. These symptoms interfere with normal life and therefore qualify as premenstrual syndrome in 20 to 30% of women. In 3 to 8%, they are severe.The first period usually begins between twelve and fifteen years of age, a point in time known as menarche. They may occasionally start as early as eight, and this onset may still be normal. The average age of the first period is generally later in the developing world and earlier in developed world. The typical length of time between the first day of one period and the first day of the next is 21 to 45 days in young women and 21 to 31 days in adults (an average of 28 days). Menstruation stops occurring after menopause which usually occurs between 45 and 55 years of age. Bleeding usually lasts around 2 to 7 days.The menstrual cycle is governed by hormonal changes. These changes can be altered by using hormonal birth control to prevent pregnancy. Each cycle can be divided into three phases based on events in the ovary (ovarian cycle) or in the uterus (uterine cycle). The ovarian cycle consists of the follicular phase, ovulation, and luteal phase whereas the uterine cycle is divided into menstruation, proliferative phase, and secretory phase.Stimulated by gradually increasing amounts of estrogen in the follicular phase, discharges of blood (menses) flow stop, and the lining of the uterus thickens. Follicles in the ovary begin developing under the influence of a complex interplay of hormones, and after several days one or occasionally two become dominant (non-dominant follicles shrink and die). Approximately mid-cycle, 24–36 hours after the luteinizing hormone (LH) surges, the dominant follicle releases an ovocyte, in an event called ovulation. After ovulation, the ovocyte only lives for 24 hours or less without fertilization while the remains of the dominant follicle in the ovary become a corpus luteum; this body has a primary function of producing large amounts of progesterone. Under the influence of progesterone, the uterine lining changes to prepare for potential implantation of an embryo to establish a pregnancy. If implantation does not occur within approximately two weeks, the corpus luteum will involute, causing a sharp drops in levels of both progesterone and estrogen. The hormone drop causes the uterus to shed its lining in a process termed menstruation. Menstruation also occur in some other animals including shrews, bats, and other primates such as apes and monkeys.
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