To use natural family planning successfully, a woman must accurately identify her fertile window, which is closely linked to the time of ovulation. Around ovulation, her basal body temperature rises slightly due to progesterone release.
As part of her cycle tracking, a woman recorded her basal body temperature every morning for 28 days, starting on the first day of her menstruation. Her results are presented in the table below:
| Day | Temperature (∘C^\circ\text{C}∘C) | Day | Temperature (∘C^\circ\text{C}∘C) |
|---|---|---|---|
| 1 | 36.3 | 15 | 36.7 |
| 2 | 36.2 | 16 | 36.7 |
| 3 | 36.3 | 17 | 36.8 |
| 4 | 36.2 | 18 | 36.8 |
| 5 | 36.3 | 19 | 36.8 |
| 6 | 36.3 | 20 | 36.7 |
| 7 | 36.2 | 21 | 36.7 |
| 8 | 36.3 | 22 | 36.7 |
| 9 | 36.3 | 23 | 36.7 |
| 10 | 36.2 | 24 | 36.7 |
| 11 | 36.3 | 25 | 36.7 |
| 12 | 36.3 | 26 | 36.7 |
| 13 | 36.2 | 27 | 36.6 |
| 14 | 36.3 | 28 | 36.3 |
Determine the total number of days during this cycle on which her recorded temperature was strictly below 36.5∘C36.5^\circ\text{C}36.5∘C.
State the day on which an egg was most likely released from her ovary.
Suggest how the woman could ensure her daily basal body temperature measurements are as accurate and consistent as possible.
During this 28-day cycle, the woman's ovaries produced two crucial hormones, Hormone A and Hormone B. The functions of these hormones are described in the table below:
| Hormone A | Hormone B |
|---|---|
| Maintains the lining of the uterus | Repairs and thickens the uterus lining |
| Prevents the further release of eggs | Controls the development of female secondary sexual characteristics |
Name Hormone A.
Name Hormone B.
State the pathway by which these hormones travel from the ovaries to their target tissue in the uterus.
State two female secondary sexual characteristics that develop during puberty, other than the start of the menstrual cycle.
