Three Dimensional Ultrasonographic Detection of Human Ovulation

Inclusion Criteria: * Healthy biological females * Regular menstrual cycles (21-35 days) Exclusion Criteria: * BMI \<18 or \>30 * Pregnancy * Breastfeeding mothers * History of infertility * History of hysterectomy or oophorectomy * Reproductive health issues that can interfere with study outcomes * Smoking * Not on any hormonal medication that affects reproduction (including hormonal contraception) * History of metabolic syndrome or untreated thyroid disease * Contra-indication to non-steroidal anti-inflammatory drug (NSAID) use. These include: * Gastric ulcers or gastro-intestinal bleeding * History of myocardial infarction or a coronary artery bypass * Cerebrovascular disease * Hypertension * Chronic or acute renal failure * Severe liver disease * Nasal polyp syndrome