Induction of oestrus and fertility in the anoestrous ewe with hormones and controlled lighting and temperature

Neonatal uptake of mercury (Hg) from milk was examined in a pregnant sheep model, where radioactive mercury (Hg203)/silver tooth fillings (amalgam) were newly placed. A crossover experimental design was used in which lactating ewes nursed foster lambs. In a parallel study, the relationship between dental history and breast milk concentration of Hg was also examined in 33 lactating women. Results from the animal studies showed that, during pregnancy, a primary fetal site of amalgam Hg concentration is the liver, and, after delivery, the neonatal lamb kidney receives additional amalgam Hg from mother's milk. In lactating women with aged amalgam fillings, increased Hg excretion in breast milk and urine correlated with the number of fillings or Hg vapor concentration levels in mouth air. It was concluded that Hg originating from maternal amalgam tooth fillings transfers across the placenta to the fetus, across the mammary gland into milk ingested by the newborn, and ultimately into neonatal body tissues. Comparisons are made to the U. S. minimal risk level recently established for adult Hg exposure. These findings suggest that placement and removal of "silver" tooth fillings in pregnant and lactating humans will subject the fetus and neonate to unnecessary risk of Hg exposure.

show abstract

Mercury from maternal “silver” tooth fillings in sheep and human breast milk

Vimy

Hooper

King

et al. 1997

Biol Trace Elem Res

View full text Add to dashboard Cite

show abstract

Ethanol kinetics during pregnancy. study in ewes and their fetuses

Ng¹,

Cottle²,

Baker³

et al. 1982

Progress in Neuro-Psychopharmacology and Biological Psychiatry

View full text Add to dashboard Cite

Controlled Photoperiodic Environments for Food Animals

Tucker

Ringer

1982

Science

View full text Add to dashboard Cite

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Induction of oestrus and fertility in the anoestrous ewe with hormones and controlled lighting and temperature

Cited by 3 publications

References 19 publications

Mercury from maternal “silver” tooth fillings in sheep and human breast milk

Mercury from maternal “silver” tooth fillings in sheep and human breast milk

Ethanol kinetics during pregnancy. study in ewes and their fetuses

Controlled Photoperiodic Environments for Food Animals

Contact Info

Product

Resources

About