Measuring Core Body Temperature Using TempuRing

Inclusion Criteria

• •1. Participant is willing and able to give informed consent for participation
• •2. Females aged 21 to 43 years
• •3. Have a body mass index (BMI) above 19 and below 29
• •4. Regular menstrual cycles, i.e. no greater than 7 days difference between the shortest and longest cycle in the last 6 months
• •5. Minimum menstrual cycle 24 days
• •6. Maximum menstrual cycle 35 days
• •7. Normal pap smear within the last year
• •8. Willing to use the fertility device for at least 3 cycles
• •9. Willing to fill in online questionnaires
• •10. Willing to attend clinic up to 6 times per cycle for transvaginal ultrasound and blood tests
• •11. Willing to perform LH urine tests at home twice a day from day 8 of cycle until it is positive
• •12. Willing to document the last day of the previous menses and first day of the following menses.
• •13. Willing to measure and record oral at the same time each morning.
• •14. Normal pelvic ultrasound and blood results obtained during screening tests