Menstrual cycle phases

• Alemannisch • العربية • Asturianu • Azərbaycanca • Bikol Central • Български • Bosanski • Català • Чӑвашла • Čeština • Dansk • Deutsch • Eesti • Ελληνικά • Español • Euskara • فارسی • Français • Gaeilge • Galego • 한국어 • Հայերեն • हिन्दी • Hrvatski • Bahasa Indonesia • Italiano • עברית • ಕನ್ನಡ • ქართული • Kreyòl ayisyen • Kurdî • Latina • Latviešu • Lietuvių • Magyar • Македонски • മലയാളം • मराठी • Bahasa Melayu • Nederlands • नेपाली • 日本語 • Polski • Português • Română • Runa Simi • Русский • ᱥᱟᱱᱛᱟᱲᱤ • Shqip • සිංහල • Simple English • Slovenščina • کوردی • Српски / srpski • Srpskohrvatski / српскохрватски • Sunda • Suomi • Svenska • Татарча / tatarça • తెలుగు • ไทย • Türkçe • Українська • Tiếng Việt • 吴语 • 中文 The menstrual cycle is a series of natural changes in Naturally occurring hormones drive the cycles; the cyclical rise and fall of the Each cycle occurs in phases based on events either in the ovary (ovarian cycle) or in the uterus (uterine cycle). The ovarian cycle consists of the The menstrual cycle can cause some women to experience Cycles and phases [ ] The menstrual cycle encompasses the ovarian and uterine cycles. The ovarian cycle describes changes that occur in the Measured from the first day of one menstruation to the first day of the next, the length of a menstrual cycle varies but has a Ovarian cycle [ ] Between menarche and menopause the ovaries regularly alternate between luteal and follicular phases during the monthly menstrual cycle. After ovulation, t...

\( \newcommand\) • • • • • • What's the most important part of the female menstrual cycle? A menstrual cycle calendar. A lot of things to keep track of. And for a few very important reasons, it is important to know when a woman is ovulating. But what's the most important part of the female menstrual cycle? That depends on who you ask. Menstrual Cycle Ovulation, the release of an egg from an ovary, is part of the menstrual cycle, which typically occurs each month in a sexually mature female unless she is pregnant. Another part of the cycle is the monthly period, or menstruation. Menstruation is the process in which the endometrium of the uterus is shed from the body. The menstrual cycle is controlled by Phases of the Menstrual Cycle As shown in Figure Phases of the Menstrual Cycle. The menstrual cycle occurs in the phases shown here. After menstruation, the endometrium begins to build up again. At the same time, a follicle starts maturing in an ovary. Ovulation occurs around day 14 of the cycle. After it occurs, the endometrium continues to build up in preparation for a fertilized egg. What happens next depends on whether the egg is fertilized. If the egg is fertilized, the endometrium will be maintained and help nourish the egg. The ruptured follicle, now called the corpus luteum, will secrete the hormone progesterone. This hormone keeps the endometrium from breaking down. If the egg is not fertilized, the corpus luteum will break down and disappear. Without progesterone, ...

The first day of your period is considered day one of your menstrual cycle. The menses phase typically lasts between 3 and 7 days. You're likely to find you feel less productive and more sluggish during this phase of your cycle, which is perfectly normal. The bleeding and cramping aren't solely to blame—your hormone levels are also low during the menses phase. The ovulation process typically lasts for about 24 hours, but high hormone levels can last for about three to four days on either end from when the egg is released. The peak of estrogen may mean you feel more energetic than usual, while elevated testosterone levels can cause an increase in extroversion. Once the egg has been released during ovulation, the follicle itself begins to change. The empty sac from which the egg erupts is referred to as the corpus luteum. This new structure produces progesterone to thicken the uterine lining in the event a fertilized egg implants, as well as some estrogen. If pregnancy occurs, your body will begin producing human gonadotropin (hCG) to support the corpus luteum. Progesterone levels will also continue to rise. However, if the egg has not been fertilized, progesterone and estrogen levels will drop in preparation for your body to shed the thickened uterine lining during your next period. A Word From Verywell Your menstrual cycle is more than just your period—it's the sequence of events that occurs in your body each month. Recognizing how your body responds to each phase of your ...

What Is a Normal Period? A normal period (or normal Think about how old you were when you got your When it comes to periods, "normal" covers a lot of ground. Use the broad range of factors below as a guide. And remember: The only true normal is what's normal for you. Normal Period Timing Every month, your entire body prepares to This is your menstrual cycle. It starts on the first day of your last period and ends on the first day of your next period. Though the average cycle is 28 days long, anything between 21 and 45 days is considered normal. That's a 24-day difference. For the first year or two after menstruation begins, women tend to have longer cycles that don't start at the same time every month. Older women often have shorter, more consistent cycles. If you're on How long your period lasts also varies. The time from the first sign of Normal Period Flow If the egg your ovary releases every month isn't fertilized, the lining of your uterus sheds through your Whether your flow is light, moderate, or heavy, it's all considered normal. Normal Period Symptoms Some months, your • • Cramping in the lower abdomen and back • More • • Mood swings • Breast tenderness • Bloating Not every period is the same, though. Most of the time, an irregular or abnormal period isn’t serious. But you should call the doctor if: • You have a heavier than usual flow • You need to change your pad or tampon hourly • Your period lasts more than 7 days • Your period suddenly stops for more than 90 ...

\( \newcommand\) • • • • • • • • • • • • • • • • Taboo Topic The banner in Figure \(\PageIndex\): Water for People Uganda celebration of Menstrual Hygiene Day in 2014 What Is the Menstrual Cycle? The menstrual cycle refers to natural changes that occur in the female reproductive system each month during the reproductive years. The cycle is necessary for the production of eggs and the preparation of the uterus for pregnancy. It involves changes in both the ovaries and the uterus and is controlled by pituitary and ovarian hormones. Day 1 of the cycle is the first day of the menstrual period , when bleeding from the uterus begins as the built-up endometrium lining the uterus is shed. The endometrium builds up again during the remainder of the cycle, only to be shed again during the beginning of the next cycle if pregnancy does not occur. In the ovaries, the menstrual cycle includes the development of a follicle, ovulation of a secondary oocyte, and the degeneration of the follicle if pregnancy does not occur. Both uterine and ovarian changes during the menstrual cycle are generally divided into three phases, although the phases are not the same in the two organs. Menarche and Menopause The female reproductive years are delineated by the start and stop of the menstrual cycle. The first menstrual period usually occurs around 12 or 13 years of age, an event that is known as menarche. There is considerable variation among individuals in the age of menarche. It may occasionally oc...

The purpose of the monthly menstrual cycle is to prepare for pregnancy. Menstrual cycles vary in length and intensity. During each menstrual cycle, an egg develops and is released from the The menstrual cycle is divided into four phases: • menstrual phase • follicular phase • ovulation phase • luteal phase The length of each phase can vary and change over time. The menstrual phase is the first stage of the menstrual cycle. It’s also when you get your period. This phase starts when an egg from the previous cycle isn’t fertilized. Because pregnancy hasn’t taken place, levels of the hormones estrogen and progesterone drop. The thickened lining of your uterus, which would support a pregnancy, is no longer needed, so it sheds through your vagina. During your period, you release a combination of blood, mucus, and tissue from your uterus. You may have period symptoms like these: • cramps (try these • tender breasts • bloating • mood swings • irritability • headaches • tiredness • low back pain The follicular phase starts on the first day of your period (so there is some overlap with the menstrual phase) and ends when you ovulate. It starts when the hypothalamus signals your pituitary gland to release Only the healthiest egg will eventually mature. (On rare occasions, a female may have two eggs mature.) The rest of the follicles will be reabsorbed into your body. The maturing follicle sets off a surge in estrogen that thickens the lining of your uterus. This creates a nutrient-ric...

\( \newcommand\) • • • The uterine cycle describes a series of changes that occur to the lining of the uterus, or endometrium, during a typical menstrual cycle. Key Points • The uterine cycle includes the increase in the endometrium in preparation for implantation and the shedding of the lining following lack of implantation, termed menstruation. • Menstrual cycles are counted from the first day of menstrual bleeding. • Endometrial thickening is stimulated by the increasing amount of estrogen in the follicular phase. • If implantation does not occur, progesterone and estrogen levels drop, which stimulates menstruation. Key Terms • endometrium: The mucous membrane that lines the uterus in mammals, in which fertilized eggs are implanted. • menstrual cycle: In the females of some animal species, the recurring cycle of physiological changes associated with reproductive fertility. • decidua: A mucous membrane that lines the uterus: it is shed during menstruation and modified during pregnancy. Several changes to the uterine lining (endometrium) occur during the menstrual cycle, also called the uterine cycle. The endometrium is the innermost glandular layer of the uterus. During the menstrual cycle, the endometrium grows to a thick, blood vessel-rich tissue lining, representing an optimal environment for the implantation of a blastocyst upon its arrival in the uterus. Menstrual cycles are counted from the first day of menstrual bleeding and are typically 28 days long. During mens...

https://med.libretexts.org/@app/auth/3/login?returnto=https%3A%2F%2Fmed.libretexts.org%2FBookshelves%2FAnatomy_and_Physiology%2FAnatomy_and_Physiology_(Boundless)%2F26%253A_The_Reproductive_System%2F26.6%253A_Physiology_of_the_Female_Reproductive_System%2F26.6D%253A_Hormonal_Regulation_of_the_Female_Reproductive_Cycle \( \newcommand\) • • • • • • • • The menstrual cycle is controlled by a series of changes in hormone levels, primarily estrogen and progesterone. Key Points • The follicular phase begins with an increase in follicle -stimulation hormone ( FSH ), which causes increases in luteinizing hormone ( LH ) and gonadotropin-releasing hormone ( GnRH ). Concurrent increases in estrogen levels cause increases in progesterone, stimulating proliferation of the endometrium. • A spike in LH and FSH (“LH surge”) causes ovulation, following a suppression of GnRH. • Estrogen levels continue to rise following ovulation and the corpus luteum forms, which secretes progesterone in significant levels and causes decreases in LH and FSH levels. • Without implantation, estrogen and progesterone levels will fall and the corpus luteum will degrade. Key Terms • estrogen: A hormone responsible for the appearance of secondary sex characteristics of human females at puberty and the maturation and maintenance of the reproductive organs in their functional state. • cumulus: A cluster of cells that surround the oocyte both in the ovarian follicle and after ovulation. These cells coordinate folli...