1. Endocannabinoid Research Group (T.K., T.H.M., A.H.T., J.C.K.), Reproductive Sciences, Leicester Royal Infirmary, Leicester, Leicestershire, LE2 7LX, United Kingdom;
2. Systems Toxicology (E.L.M.), Medical Research Council Toxicology Unit, Hodgkin Building, Lancaster Road, Leicester, LE1 9HN, United Kingdom
3. Contraception, Sexual, and Reproductive Health Services (E.O.), University Hospitals of Leicester National Health Service (NHS) Trust, St Peters Health Centre, Leicester, LE2 0TA, United Kingdom