Researchers at RIKEN Center for Developmental Biology successfully cloned mice using a drop of peripheral blood from its tail. This method uses white blood cells, which allow for repeated sampling with minimal risk to the donor mouse. While not surpassing the success rate of cumulus cells, this technique demonstrates a promising altern...
Research reveals that maternal diabetes impairs the methylation of the maternal imprinting gene Peg3, contributing to impaired development in offspring. This effect is observed even before the onset of overt symptoms and affects embryo development and number of offspring.
A study published in Biology of Reproduction found that consuming 75 grams of walnuts per day enhances sperm vitality, motility, and morphology in healthy young men. The walnut diet also reduced chromosomal abnormalities in sperm.
A low-protein diet during pregnancy may increase the risk of hypertension in children. Research suggests that reduced activity of an enzyme called Hsd17b2 allows more testosterone to reach the fetus, leading to increased susceptibility to adulthood hypertension.
Researchers have identified three types of fetal cells in maternal organs: trophoblasts, mesenchymal stem cells, and immune system cells. These cells may help the mother's immune system tolerate the fetus and aid in organ repair.
Research suggests that brief prenatal exposure to plant estrogens may affect a woman's fertility as an adult. Exposure to estrogenic chemicals in the womb or during childhood has been shown to alter immune response genes and compromise oviduct support for preimplantation embryo development, leading to infertility.
Researchers discovered that a key enzyme in the milk of lactating tsetse flies functions similarly to mammalian enzymes, making them a potential model for studying lipid metabolism during mammalian lactation. Reduced levels of this enzyme led to poor health in offspring, suggesting targeting it could aid population reduction efforts.
A study of eight male giant pandas found that reproductive fitness varies throughout the year, with waves of activity occurring 3-5 months before most females display estrus. This new understanding will help improve captive panda management and potentially aid in reintroducing pandas into the wild.
Reproductive scientists have successfully created male and female mice from two fathers using induced pluripotent stem (iPS) cells. This breakthrough could pave the way for preserving endangered species and improving livestock breeds, as well as advancing human assisted reproductive technology (ART).
Exposure to low doses of BPA affects the earliest stages of egg production in the ovaries of developing mouse fetuses. The study reveals a striking down-regulation of mitotic/cell cycle genes, raising concerns about the reproductive lifespan of female mice.
Living with a female mouse extends male reproductive life span by 20%, increasing fertility to 32 months. The effect is due to delays in sperm production and may be influenced by endocrine and nervous systems.
A recent study found that long-term exposure to marijuana can negatively affect human male fertility by increasing anandamide levels. Additionally, two papers investigate the effects of delayed fatherhood in mice, revealing abnormalities in offspring's behavior and reproductive fitness.
Researchers at UCLA found that vitamin D stimulates cathelicidin production in placental tissues, enhancing antibacterial responses and protecting trophoblast cells from infection. The study suggests that pregnant women supplementing with vitamin D may enhance placental innate immunity.
A recent study published in Biology of Reproduction found that SOHLH2 plays a critical role in the formation and survival of oocytes and primordial follicles in mouse ovaries. The study, led by Youngsok Choi et al., discovered that SOHLH2 is essential for both oogenic and folliculogenic processes.
A study by Maatouk et al. reveals that DICER1 is required for normal spermatogenesis in mice, with defects leading to functionally abnormal sperm. Meanwhile, Morgan et al.'s research on mouse embryos demonstrates the impact of culture conditions on epigenetic regulation and adult health.
Researchers used proteomics to compare the nuclear proteome of immature and mature gonadotrophic cells, revealing novel proteins that regulate gonadotropin gene transcription and RNA splicing. Urban air pollution was found to affect placental development, leading to reduced fetal growth and pregnancy complications.
A new study reveals that lactate dehydrogenase C (LDHC) enzyme plays a critical role in male fertility, affecting sperm motility and ATP production. Meanwhile, research on polycystic ovary syndrome (PCOS) suggests prenatal exposure to androgens may contribute to infertility symptoms.
Researchers discovered that phospholipase C zeta (PLCZ1) promotes calcium oscillations in egg activation, but its nuclear translocation differs among species. Additionally, a study showed that exposure to polychlorinated biphenyls (PCBs) can disrupt reproductive markers in rats and their grand offspring.
Recent studies in Biology of Reproduction suggest that maternal follicular testosterone influences the sex of bovine embryos, while research on maternal cell microchimerism reveals its presence in major organs of healthy newborn mice. These findings highlight the importance of understanding the mechanisms behind these phenomena.
A team of scientists found that limiting food intake during pregnancy impairs nutrient supply to fetuses and slows soft tissue growth. Adequate weight gain by pregnant teen girls is crucial to reduce low-birth-weight infant risk, suggesting a need for personalized dietary advice.
A team of researchers has successfully frozen and preserved genetically enhanced pig embryos, enabling their transportation across the country and worldwide. The breakthrough procedure removes lipids from unfertilized eggs before fertilizing them with muscle cells containing modified genetic material.
A study by Christine Gieseke and Prue Talbot found that cigarette smoke significantly reduces the transport of hamster eggs through the oviduct. The researchers exposed cumulus-coated eggs to six types of cigarette smoke, resulting in a 40-55% increase in adhesion to the infundibulum and a 20-35% decrease in egg transportation rates.
A new study published in Biology of Reproduction found that delayed motherhood in mice leads to decreased life expectancy and reduced body weight. The researchers assessed various aspects of reproductive fitness but found no significant deleterious effects on other parameters.
A recent study by Vanderbilt University researchers has found that selenoprotein P (SEPP1) is essential for normal sperm development and male fertility. The study used genetically altered mice to demonstrate the critical role of SEPP1 in delivering selenium to the testes, where it plays a key role in maintaining sperm health.
Researchers found that the number of vertebrae in cloned carp-goldfish fish was determined by the goldfish's egg cytoplasm, not its genetic code. The study suggests a
Scientists have successfully germline-modified mice using stem cells, paving the way for experimental analyses. Researchers also shed light on the effects of osmolarity and glucose/phosphate levels on embryo development.
A team of Japanese researchers has developed a novel method for introducing transgenes into animals by injecting retroviruses into immature male mouse testes. The technique resulted in high fertility rates and stable transgene transmission, enabling the production of genetically modified offspring from a single founder male.
A team of scientists has successfully achieved the first live births of killer whales through artificial insemination. The study, led by Dr. Todd R. Robeck, used genome resource banking and artificial insemination to store sperm from male orcas for later use. This breakthrough may help maintain genetic diversity in captive marine mammals.
Researchers successfully fertilized rabbit oocytes with freeze-dried sperm, showing promise for long-term storage. The breakthrough improves upon previous success with mouse sperm and opens up possibilities for preserving sperm from humans and other mammalian species.
Scientists have successfully grafted primate testes into mice, resulting in the rapid production of fertile sperm. This breakthrough could preserve genetic material from endangered nonhuman primates and offer reproductive options to men rendered infertile by cancer treatments.