Study to Evaluate the Safety, Tolerability, and Pharmacokinetics of Epelsiban in Healthy Female Volunteers

Inclusion Criteria: * Females between 18 and 55 years of age inclusive, at the time of consent. * Healthy as determined by the Investigator or medically qualified designee based on a medical evaluation including medical history, review of medications previously used, physical examination, laboratory tests and ECG. * Body mass index (BMI) within the range 18-35 kilogram per square meter( kg/m\^2) (inclusive). * Female subject is eligible to participate if she is not pregnant (as confirmed by a negative serum human chorionic gonadotropin \[hCG\] test), not lactating, and at least one of the following conditions applies: Non-reproductive potential or postmenopausal. Exclusion Criteria * Alanine Transferase (ALT) and bilirubin \>1.5x upper limit of normal(ULN) (isolated bilirubin \>1.5xULN is acceptable if bilirubin is fractionated and direct bilirubin \<35%). * Current or chronic history of liver disease, or known hepatic or biliary abnormalities (with the exception of Gilbert's syndrome or asymptomatic gallstones). * Corrected QT (QTc) \> 450 milliseconds (msec). - History of regular alcohol consumption within 3 months of dosing on Day 1 defined as: an average weekly intake of \>7 drinks for females. One drink is equivalent to 12 gram of alcohol: 12 ounces (360 milliliter \[mL\]) of beer, 5 ounces (150 mL) of wine or 1.5 ounces (45 mL) of 80 proof distilled spirits. * Urinary cotinine levels indicative of smoking or history or regular use of tobacco- or nicotine-containing products within 6 months prior to screening. * History of sensitivity to any of the study medications, or components thereof or a history of drug or other allergy that, in the opinion of the Investigator or Medical Monitor, contraindicates their participation. * Presence of hepatitis B surface antigen (HBsAg), positive hepatitis C antibody test result at screening or within 3 months prior to first dose of Study Treatment. For potent immunosuppressive agents, subjects with presence of hepatitis B core antibody (HBcAb) should also be excluded. * A positive pre-study drug/alcohol screen. * A positive test for human immunodeficiency virus antibody. * Where participation in the study would result in donation of blood or blood products in excess of 500 mL within 3 months. * The subject has participated in a clinical trial and has received an investigational product within the following time period prior to the first dosing day in the current study: 30 days, 5 half-lives or twice the duration of the biological effect of the investigational product (whichever is longer). * Exposure to more than four new chemical entities within 12 months prior to the first dosing day.