Female mammals—including humans—are born with all of their egg cells. Of a woman's one to two million egg cells, about 400 mature before menopause and can be fertilized. Some egg cells therefore survive for several decades—and ...
Cell & Microbiology
Jul 9, 2024
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32
Nearly half of teenagers are worried about having children and many lack knowledge about their reproductive health, find two new studies by University College London researchers.
Education
Feb 12, 2024
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1
Mutations that disrupt development of germ cells cause infertility or birth defects. Mutations that cause female infertility in humans, such as mutations in the gene BMP15, also cause infertility in zebrafish. However, female ...
Cell & Microbiology
Jan 22, 2024
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45
In an article published in the journal Development, researchers at the University of São Paulo's Luiz de Queiroz College of Agriculture (ESALQ-USP) in Brazil describe mechanisms relating to the development of the tomato ...
Molecular & Computational biology
Jan 9, 2024
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1
Spain recently adopted a menstrual leave policy, which makes additional (paid or unpaid) days off work available to "only and all cisgender women."
Social Sciences
Apr 28, 2023
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10
During embryonic development, two different cascades of genetic signals determine whether the embryo's primordial gonad will become testes or ovaries, and thus whether the embryo will develop into a male or a female. Disruptions ...
Molecular & Computational biology
Jan 4, 2023
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64
Queen bees with viral infections have smaller ovaries than their healthy counterparts, a recent UBC study has found, which could threaten the health and financial viability of their colonies.
Ecology
Oct 25, 2022
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15
Begonia is the sixth largest genus of angiosperms. Yunnan has 117 species of Begonia among the 250 species from China. Among the currently known Begonias in China, only Begonia yui has paired bracteoles below the ovary.
Plants & Animals
Jul 13, 2022
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7
Begonia is one of the largest genera of flowering plants with over 2,000 species. They are found naturally in tropical and subtropical regions around the world.
Plants & Animals
May 13, 2021
0
12
Researchers at Karolinska Institutet in Sweden have analyzed all cell types in the human ovary and found that the hotly debated "egg stem cells" do not exist. The results, published in Nature Communications, open the way ...
Cell & Microbiology
Mar 2, 2020
1
422
The ovary is an ovum-producing reproductive organ, often found in pairs as part of the vertebrate female reproductive system. Ovaries in anatomically female individuals are analogous to testes in anatomically male individuals, in that they are both gonads and endocrine glands.
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