Generally, heat cramps can be called as painful, brief muscle cramps wherein the muscles may spasm or jerk involuntarily. Heat cramps may occur during exercise or work in a hot environment or they may start a few hours later. Heat cramps mostly involve muscles that are fatigued by heavy work like calves, thighs, and shoulders. One is most at risk if one is doing work or activities in a hot environment–mostly during the first few days of an activity to which one is not used to. One is also at risk if one sweats a great deal during exercise and drinks large amounts of water or other fluids that lack salt. The symptoms of heat cramps are muscle spasms, painful, involuntary, brief, intermittent and usually self-limited (go away on their own).

If one is trying to get pregnant, the time you'll be most fertile begins one day prior to the day you ovulate and lasts for three days after you ovulate. Ovulation is the procedure by which your body releases one or more eggs from your ovary. If the egg is fertilized and productively implants, you're pregnant. There are numerous signs that could indicate you're ovulating. Learn to identify these changes, and you can boost the odds of getting pregnant by having sexual intercourse during this optimal time. According to the American College of Obstetricians and Gynecologists (ACOG), without delay following ovulation most women experience a slight but detectable rise in their normal body temperature. By monitoring your basal body temperature first thing in the morning ahead of you rise on a daily basis, and tracking the results on a basal body temperature chart, it's possible to determine that ovulation has occurred. Though, conditions such as fever, restless sleep, and exertion can affect the accuracy of the temperature readings.

One may feel no more than a fleeting discomfort from your period, or you could be doubled up by it. Generally the pain comes in cramp-like spasms. It could start in the inferior abdomen, and may radiate up the spine and down the legs, or center in your lower back. If you get it actually badly you may feel dizzy or nauseous, and get diarrhea or vomit. If this occurs you should go and see your doctor. Most women find the pain generally comes on a few hours before their periods start and begins to ease once the flow begins. But in a few, pain continues into the next and even the third day of their period. Each month the lining of the uterus builds up in training for a possible pregnancy. If a pregnancy occurs, the fertilized egg attaches itself to the inside layer to be nourished as it develops into a baby.

During a woman's menstrual cycle, changes take place in the body that can trigger painful cramping, mood swings, and many other symptoms. As every woman is different, no single treatment effectively relieves all PMS symptoms in all women. Premenstrual syndrome is a badly understood complex of symptoms occurring a week to ten days before the start of each menstrual cycle. When that time of the month comes closer, several women dread the onset of PMS. In medical terms, PMS, or premenstrual stress syndrome, is characterized by a series of symptoms that come out just prior to menstrual bleeding during the menstrual cycle. PMS symptoms comprise irritability, depression, mood swings, and cramping. Menstrual cramping during PMS is one of the most discomforting symptoms, and there is a diversity of treatments for women that are helpful in this and other PMS-related conditions.

Muscle cramp and spasm are a bothersome condition that involves a sudden, involuntary contraction and tightening of a muscle that will not immediately relax. Muscle cramps and spasms can grip part or all of a muscle, or a number of muscles within a muscle group and even though a spasm or cramp can occur in just about any muscle. The most familiar muscle groups affected are, the lower leg and calf muscles, the upper leg, including the hamstrings and quadriceps, the feet and hands. Muscle cramps and spasms can variety in intensity from a slight twitch to a severe, agonizing contraction. They can last wherever from a few seconds to over 15 minutes and can generally be seen visibly by the way the muscle twitches and moves under the skin.

What is an abdominal cramp?

The pain, especially due to contraction of a muscle that occurs in the abdomen region of the body. It is also called belly ache or abdominal pain.

About abdominal cramp -
It may occur in any organ of the abdomen, in any digestion related organ like stomach, small or large intestine, liver, gallbladder, pancreas, aorta (the large blood vessel running down inside the abdomen), appendix or kidneys. It may even start in some other region like the chest or pelvic region. The intensity of the abdominal pain may differ as per the causes. Mild cramps may be caused due to gas or cramp of viral gastroenteritis. In some life threatening conditions like colon cancer or appendicitis in its early stage, there may be a mild pain or no pain at all.

By endometriosis biopsy I'm guessing you mean an endometrial biopsy, a test in which the doctor inserts a small device through the cervix into the uterine cavity in order to get a taster of the uterine lining tissue. An endometrial biopsy does not diagnose endometriosis. The only way to diagnose endometriosis for certain is to perform a laparoscopy, a surgical procedure in which the doctor inserts a telescope through a tiny slit in your belly button to view your pelvic organs directly. Severe pains and cramps around the time of your period can be because of endometriosis, a condition in which the uterine lining tissue gets outside the uterine cavity, lands in places in doesn't belong and causes pain.

The menstrual cramps are medically termed as dysmenorrhea. The rupturing of the ovarian follicle begins the menstrual cycle. This is under the effect of the hormone estrogen. There is another hormone, which is functioning called the Proglandins, which causes a certain amount of the swellings.

The types;
There are majority two types; the Primary and the Secondary.
The primary is caused by the regulation of the Proglandins.These result in the pain and inflammations in the uterine walls. This triggers the uterine contractions also.

Ovulation is a stage of the female menstrual cycle, which involves the release of an egg from one of the ovaries. For most women, ovulation takes place about once every month until menopause, apart from episodes of pregnancy and breastfeeding. About one in five women experience pain and discomfort all through ovulation. The duration of the pain varies from one woman to the after that, but ranges from a few minutes to 48 hours. In most cases, ovulation pain doesn't mean that whatever thing is wrong. However, brutal pain may sometimes be symptomatic of gynecological conditions including endometriosis. See your doctor if your ovulation cramp lasts longer than three days or is associated with other unusual menstrual symptoms, such as heavy bleeding. Ovulation cramp is also known as mid-cycle pain and mittelschmerz.

What Are Muscle Cramps?

A cramp can be defined as an involuntary and forcibly contracted muscle that does not relax. Cramps may affect any muscle under your voluntary control that is skeletal muscle. Muscles that span two joints are the ones that are most prone to cramping. Cramps can involve a part or all of muscle, or even several muscles in a group. The most commonly affected muscle groups are back of lower leg/calf, back of thigh (hamstrings) and front of thigh (quadriceps). Also, cramps in the feet, hands, arms, abdomen and along the rib cage are very common.