Clinical Research Directory

Inclusion Criteria: * Females aged 18 and over actively trying to conceive * At least 2 regular consecutive cycles since last pregnancy/miscarriage/ stopping breastfeeding or contraception * Willing to disclose their pregnancy status and provide urine samples. * Willing to give informed consent and comply with the study procedures Exclusion Criteria: * Trying to conceive for \>6 months (under 35 years) or \> 3 months (35 years and over) * Has a diagnosis of Polycystic Ovary Syndrome (PCOS) * Taking medication or has known condition which means they should not get pregnant. * Currently pregnant or breastfeeding * Using any treatment which may affect the menstrual cycle (e.g. contraceptive pill) * Using or has previously used infertility medications or hormone replacement medications containing LH or hCG \\ (e.g. Pregnyl®) * Using or undergoing any other medical treatment for fertility such as ovulation drugs, artificial insemination and assisted fertility such as IVF or ICSI * Peri-or post-menopausal, e.g. experiencing symptoms: irregular menstrual periods, hot flushes, night sweats, sleep disturbances and/or moods swings * Abnormal liver or kidney function * Taking antibiotics containing tetracycline. * Participated in this study within the last 6 months