Articles tagged with Reproductive Biology
A study published in PLOS Medicine found that certain reproductive events, such as shorter estrogen exposure, may be associated with increased dementia risk in women. However, the association between the number of children and dementia risk was similar for women and men, suggesting social and behavioral factors may play a role.
A recent study led by the University of Zurich found that well-integrated male dolphins with strong social bonds to many alliance partners produce the most offspring. The researchers analyzed 30 years of behavioral data from 85 male dolphins and used genetic data to conduct paternity analyses for more than 400 dolphins.
Adults conceived via IVF show improved social relationships and environment quality of life, according to a new study. The research also found associations between positive psychosocial factors, such as family financial situation and relationship with parents, on adult quality of life.
Scientists have identified three active compounds in sex pheromones of the world's largest hornet, Vespa mandarinia, to attract males and control its reproduction. The discovery could aid in monitoring and controlling the invasive species' spread in North America.
Aging egg cells accumulate damage to genetic material, preventing maturation and fertilization. Researchers have identified a key process causing this damage and found that anti-viral drugs can reverse it.
Researchers find that nearly 20% of sperm proteins are replaced by female-derived proteins after mating, supporting sperm viability during prolonged periods before fertilization. This 'hand-off' reveals that sperm are materially the product of both sexes.
Researchers used an ancient fish, elephant sharks, to gain insights into human biology and how a widely used medication works. The findings show that progesterone receptor activation in humans requires a different mix of hormones and steroids than in elephants sharks, with the latter not inhibited by RU486.
A research team discovered that human eggs are missing the protein KIFC1, which acts as a molecular motor to stabilize spindle poles during cell division. This finding opens up new avenues for therapeutic approaches to reduce chromosome segregation errors in human eggs.
A new 9-step blueprint has been developed to improve the use of genetics and breeding strategies in aquaculture species, aiming to strengthen food security and meet growing global demand for fish. The guidelines also aim to address concerns over fish stocks, mercury levels, and farmed fish nutritional value.
Research confirms that fish become sexually active and spawn due to growth-induced respiratory stress. The study found a consistent metabolic ratio across 133 species of fish, which supports the idea that reproduction is initiated by changes in oxygen supply and demand.
Researchers at the University of Vermont have created the first living robots capable of reproducing, using AI-designed Xenobots. This groundbreaking achievement has significant implications for regenerative medicine, as it demonstrates a new form of biological self-replication.
A Brazilian study expands amphibians' known reproductive modes to 74, creating a new classification. The research analyzed 2,171 species of amphibians, including anurans with 71 reproductive modes, some laying eggs in aquatic environments while others develop directly.
Researchers identify key neurons and signaling pathway regulating female activity before ovulation. Discoveries could lead to new treatments for menopause that sidestep estrogen and reactivates the circuit with CRISPRa technology.
Scientists from the University of Tsukuba have developed a new technique to preserve Drosophila primordial germ cells, which can be used to produce new offspring. The cryopreserved PGCs were found to be effective after up to 400 days of long-term storage.
A study of roundworms found that older parents can produce larger, faster-developing offspring with better reproductive success, challenging the notion that old parental age is detrimental. The research showed that older parents invest more nutrients in eggs, resulting in larger offspring.
A study by Johannes Gutenberg University Mainz found that genetically diverse ant colonies produce more larvae than those with similar genetic backgrounds. This improved division of labor allows for more efficient task allocation, leading to better colony performance.
Researchers from Osaka University identified SPATA33 as a key regulator of sperm motility, which will aid in developing fast-acting male contraceptives. The study also clarified the mechanism by which SPATA33 controls sperm motility, shedding light on the cause of male infertility.
A team of researchers at University of California San Diego School of Medicine discovered that GIV/Girdin plays a critical role in sperm motility, survival, and fertilization success. The protein regulates capacitation and acrosome reaction processes, essential for successful fertilization.
A new ultrasonic method improves fetal weight prediction accuracy by analyzing three-dimensional limb volumes and abdominal circumferences. The algorithm outperforms traditional formulas in predicting macrosomia and birth weights.
Research from the University of Alberta found that female squirrels who predict abundant food years have more pups that survive to maturity. This is due to their ability to recognize mast seeding years, which occur once in a few years and provide an abundance of food.
Researchers have discovered the first occurrence of in situ preserved trilobite eggs from the Lorraine Group in upstate New York. The eggs are spherical to elliptical in shape and nearly 200 micrometers in size, providing valuable insights into the reproductive biology of ancient arthropods.
A team of scientists from Australia and Panama examined the reproductive mechanisms of Saccharum spontaneum to develop better management strategies. The study found that cutting stems into smaller pieces can help prevent flowering and seed dispersal, while timing management actions during specific seasons can also be effective.
A recent study on African bird fauna found that large-scale patterns of species richness and endemism are robust to changes in species concepts. The analysis identified complexity within long-recognized centers of endemism, with certain areas acting as 'species pumps'.
Biologists at UCSD discover how to genetically convert leaves into petals, a process made possible by the expression of five genes in leaves. The achievement has significant implications for plant development and could lead to the creation of novel plants with colorful, petal-like structures.
Researchers discover a ring species of greenish warblers with gradually changing behavioral and genetic characteristics encircling the Tibetan Plateau. The study reveals how small evolutionary changes can lead to reproductive isolation between species.
The American Society of Plant Physiologists has self-published a comprehensive 1400-page textbook on biochemistry & molecular biology of plants, featuring original drawings and photographs. The book is designed for upper-level undergraduate and graduate courses, and was introduced to sell well over 600 copies at the ASPP Annual Meeting.
Strepsipteran insects have eyes with larger lenses and more receptors, allowing them to sample 'chunks' of the visual field instead of points. This unique structure improves their visual capabilities and is similar to that of extinct arthropods like trilobites.
The study uses satellite technology to track the flight paths of albatrosses in Hawaii, providing insights into their reproduction and population dynamics. The project aims to answer basic science questions and engage students in pre-college education, ultimately contributing to the conservation of these endangered species.