Will basal body temperature go up if ovulation does not occur?

Answer 1

The rise in temp is caused by progesterone that is produced after ovulation. The egg is released and then the spot where it was released from is called the corpus luteum and it immediately begins to produce prog. following the release of the egg. So, no, if you don't O, your temp doesn't show the clear thermal shift. Your temps may be hard to interpret if you are sick and have a fever however.

Answer 2

Read what the experts say:
http://www.wyhc.org/birth_control_options/Basal-Body-Temperature.php