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- Light Spotting a Few Days Before Period
- History of Menstruation
- Do Animals Menstruate?
- What does a human egg cell look like?
- Menstruation and Religion
- Menstruation Facts
- Menstruation Machine for Guys
- Can I Flush Tampons Down the Toilet?
- Do girls have to reach a certain weight before they begin…
- Average Menstrual Cycle Length
Category Archives: Research
All female placental mammals have a uterus lining (“endometrium”) that builds up when the animal is fertile. If the egg is not fertilized, most mammals reabsorb this lining into their uterus (“covert menstruation”), however a few mammals, including humans, shed this lining … Continue reading
Humans have “concealed ovulation”. Concealed ovulation is the lack of any perceptible change in an adult female (for instance, a change in appearance or scent) when she is “in heat” and near ovulation.
Over the last six months I’ve started to experience light spotting a couple of days before each period begins. The spotting is very light and is usually a brownish colour (or sometimes red).
Stem cells are a type of biological cell that have the potential to become any cell in the body, therefore they can be used to repair damaged tissue. Stem cells come from two main sources: embryos or adult tissues. Embryonic … Continue reading
A baby girl is born with 1 to 2 million oocytes (human eggs) in her ovaries. When she hits puberty all but about 300,000 will have died before becoming mature eggs. Of these, 300 to 400 will be ovulated during … Continue reading
How big is a human egg? The human egg (or ovum or oocyte) is probably the largest single cell in the human body. Sperm cells, the other half of the reproductive equation, are much, much smaller (in fact, sperm cells are the smallest cells in … Continue reading
35 mls (2.4 tablespoons) is the average volume of menstrual fluid lost during a cycle. However anywhere from 25–80 milliliters (1–6 tablespoons of menstrual fluid) is considered normal. Only 10% of women lose more or less than this when menstruating. The actual amount lost … Continue reading
Menstrual bleeding lasts for between 3 to 5 days on average each cycle, however anywhere from 2 to 7 days is considered normal. The average length of menstrual bleeding increases with age. Absence of menstrual bleeding? When a woman does not have a … Continue reading
Below-right is a copy of the Diagram of Menstruation on Wikipedia’s “Menstruation” page. This is the closest Wikipedia gets to portraying “menstrual blood”. For some reason the blood is in the diagram is pink (not red). Wikipedia states that “menstrual … Continue reading