Navigation Links
Biology of Reproduction highlights
Date:4/20/2008

Mother has the final say.

For young male offspring who suffer a dominant mother, a brother may be on the way to help bear the burden. And all because of follicular testosterone. A growing body of evidence suggests a maternal influence on sex determination: dominant human females conceive more sons. Grant et al., in an article on p. 812 of the May issue of Biology of Reproduction, find that the sex of bovine embryos positively correlates with pre-ovulatory follicular testosterone. How exposure of oocytes to follicular testosterone may influence the ability of a metaphase II egg to be preferentially inseminated by a Y-bearing sperm remains a mystery. What is known is that chronic stress elevates testosterone in females (but not males). So if you would like your next sibling to be a sister, dont aggravate your mother.

Sex of Bovine Embryos May Be Related to Mothers' Preovulatory Follicular Testosterone. V. J. Grant, R. J. Irwin, N.T. Standley, A. N. Shelling, and L. W. Chamley. Biol Reprod 2008; 78:812-815. Published online in BOR Papers-In-Press 9 January 2008; DOI 10.1095/biolreprod.107.066050


Kid? Or Mom?

Maternal cell microchimerism was first detected in karyotyped human male infants in the 1960s; however, little is known about this phenomenon. Now, on p. 883 of the May 2008 issue, Su et al. report results of a study designed to establish number of maternal cells present, effects of stage of gestation and preferential homing of maternal cells to fetal organs of mice. Such basic information is of interest because maternal cells are present in affected tissues of children with inflammatory myopathy, scleroderma, and neonatal lupus; however a cause and effect relationship has not been established. The authors found an average of 158 maternal cells per 100,000 neonatal cells in fetal mice, with preferential homing of these cells to fetal heart and lung, compared to liver and spleen (although other work cited indicated preferential migration of maternal cells to immunologically active organs including thymus, spleen, liver, and bone marrow). Overall, the authors provide solid evidence that maternal microchimerism is common in major organs of healthy newborn mice, highlighting a need to determine the type of migrating cell(s) and possible consequences of maternal microchimerism in pregnancy and disease pathogenesis.

Murine Maternal Cell Microchimerism: Analysis Using Real-Time PCR and In Vivo Imaging. Eric C. Su, Kirby L. Johnson, Hocine Tighiouart, and Diana W. Bianchi. Biol Reprod 2008; 78:883-887. Published online in BOR Papers-In-Press 6 February 2008; DOI 10.1095/biolreprod.107.063305


'/>"/>

Contact: Judith Jansen
ssr@ssr.org
Society for the Study of Reproduction
Source:Eurekalert

Related biology news :

1. American Society for Microbiology 108th General Meeting
2. iPlant Kickoff Conference at CSHL begins tackling plant biologys grand challenges
3. Work with power grids leads to cell biology discovery
4. Systems biology approach identifies nutrient regulation of biological clock in plants
5. Cold Spring Harbor Laboratory to play central role addressing key questions in plant biology
6. UA-led research team awarded $50 million to solve plant biologys grand challenge questions
7. Case researcher in RNA biology makes waves by challenging current thinking
8. Harold Mooney and Peter Raven, winners of the BBVA Foundation Award for Conservation Biology
9. MIT reports new twist in microRNA biology
10. Springer launches Tropical Plant Biology
11. Experimental Biology and Medicine announces expansion into Asia, opens new office
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/5/2017)... KEY FINDINGS The global market for stem ... 25.76% during the forecast period of 2017-2025. The rise ... growth of the stem cell market. Download ... The global stem cell market is segmented on the ... cell market of the product is segmented into adult ...
(Date:4/3/2017)... WASHINGTON , April 3, 2017 /PRNewswire-USNewswire/ ... single-cell precision engineering platform, detected a statistically ... cell product prior to treatment and objective ... highlight the potential to predict whether cancer ... prior to treatment, as well as to ...
(Date:3/30/2017)... 30, 2017 The research team of The ... (3D) fingerprint identification by adopting ground breaking 3D fingerprint minutiae recovery ... of speed and accuracy for use in identification, crime investigation, immigration ... ... A research team ...
Breaking Biology News(10 mins):
(Date:6/22/2017)... ... June 22, 2017 , ... ... RegMedNet has produced a Spotlight series on “Cell Therapy Regulation” ... perspectives by leading experts on the unique regulatory challenges of stem cell medical ...
(Date:6/22/2017)... ... ... Charm Sciences, Inc. is pleased to announce that its Charm Amphenicol (AMPH) test ... screening test at dairies and farms for raw commingled cow milk. The test was ... system. These systems are a combination incubator and reader in one. , “The AMPH ...
(Date:6/20/2017)... , June 20, 2017  Kibow Biotech Inc., a ... announce the issuance of a new patent covering a ... by the U.S. Patent and Trademark Office on May ... of the Buzz of Bio award in 2014 in ... to developing non-drug approaches to chronic disease. Renadyl™, the ...
(Date:6/19/2017)... (PRWEB) , ... June 19, 2017 , ... ... overseeing all service activities supporting EDETEK’s products including training, implementation, support, and client ... to his new role. He has previously held leadership roles for service providers ...
Breaking Biology Technology: