Hi Smithy,
YOu are looking for a rise.
When you ovulate the corpus luteum, which was once a follicle, produces progesterone and this causes your temp to rise. And once the egg and sperm have made an embryo, it takes over producing the progesterone so you temp should stay nice and high if you are pregnant.

Some women have a fall in temp the day they ovulate and then the rise...but this doesn't happen for everyone. But the rise certainly happens when you ovulate.
Good Luck
SAM