Reproduction
The production of offspring. Reproduction need not be sexual; for example, yeast can reproduce by budding.
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- Reproductive cells
The eggs and sperm are the reproductive cells. Each mature reproductive cell is haploid in that it has a single set of 23 chromosomes containing half the usual DNA amount. Except for the eggs and sperm, each cell in the human body — there are 100 trillion cells in each of us — contains the […]
- Reproductive organs, female
they produce eggs (ova) and female hormones. Each month, during the menstrual cycle, an egg is released from one ovary. The egg travels from the ovary through a Fallopian tube to the uterus. The ovaries are the main source of female hormones (estrogen and progesterone). These hormones control the development of female body characteristics, such […]
- Reproductive system
In women, the organs that are directly involved in producing eggs and in conceiving and carrying babies; in men, the organs directly involved in creating, storing, and delivering sperm to fertilize an egg.
- Research, clinical
A study of a treatment, procedure, or medication done in a medical setting. See also clinical research trials.
- Research, controlled
A study that compared results from a treated group and a control group. The control group may receive no treatment, a placebo, or a different treatment. See also blinded study, control group, double-blinded study.