Two health experts from Rice University's Baker Institute for Public Policy are available to discuss what the Alabama Supreme Court's landmark ruling on frozen embryos could mean for the rest of the country and for the science ...
Mar 1, 2024
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Bacterial vaginosis is a common condition in which the natural microbiome of the vagina falls out of balance, sometimes leading to complications in sexual and reproductive health. But exactly how these bacterial populations ...
Nov 29, 2023
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The development of sex-specific characteristics is frequently seen in mammals. These characteristics stem from the activation of corresponding genetic programs that until now have been largely undescribed by the scientific ...
Nov 2, 2023
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By genetically testing nearly 1,000 embryos, scientists have provided the most detailed analysis of embryo fate following human in vitro fertilization.
Oct 1, 2023
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When Emelyne Heluin of France was diagnosed at the age of 17 with a hormonal disorder that causes enlarged ovaries with cysts, her symptoms included weight gain, hair loss, fatigue and pain. She was forced to quit her longtime ...
Sep 7, 2023
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The search for preventions and cures has turned inward—focusing on the immune system to stop ovarian cancer.
Aug 16, 2023
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Polycystic ovary syndrome (PCOS) is a common hormone disorder in women. Studies have shown that the change in hormones is accompanied by variations in immunological B cells. Researchers at Karolinska Institutet have now established ...
Jul 6, 2023
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Human reproduction is completely dependent on the healthy function of an underestimated but vital organ: the endometrium. This is the spongy tissue that lines the inner surface of the womb.
May 31, 2023
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Worms might not be depressed, per se. But that doesn't mean they can't benefit from antidepressants.
May 4, 2023
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For the first time in history, scientists have created mice with two dads, foretelling a day when same-sex couples may be able to have biological children of their own.
Apr 13, 2023
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A gamete (from Ancient Greek γαμέτης; translated gamete = wife, gametes = husband) is a cell that fuses with another gamete during fertilization (conception) in organisms that reproduce sexually. In species that produce two morphologically distinct types of gametes, and in which each individual produces only one type, a female is any individual that produces the larger type of gamete — called an ovum (or egg) — and a male produces the smaller tadpole-like type — called a sperm. This is an example of anisogamy or heterogamy, the condition wherein females and males produce gametes of different sizes (this is the case in humans; the human ovum is approximately 20 times larger than the human sperm cell). In contrast, isogamy is the state of gametes from both sexes being the same size and shape, and given arbitrary designators for mating type. The name gamete was introduced by the Austrian biologist Gregor Mendel. Gametes carry half the genetic information of an individual, one chromosome of each type. In humans, an ovum can carry only X chromosome (of the X and Y chromosomes), whereas a sperm can carry either an X or a Y; hence, it has been suggested that males have the control of the sex of any resulting zygote, as the genotype of the sex-determining chromosomes of a male must be XY and a female XX. In other words, due to the presence of the Y chromosome exclusively in the sperm, it is that gamete alone that can determine that an offspring will be a male.
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