Is it possible to be pregnant with no increase in bbt? Charters please help! LH surge The bottom line: Basal body temperature typically elevates 12-14 hours post ovulation, but can take up to 3 days. Basal body temperature is the average temperature in our bodies when at rest. It's Day 20 of my cycle and still no prolonged rise! Home … For a lot of women, on impregnation, the graph would show a third phase, a second rise in body temperature of about 0.7 degrees Fahrenheit more than in the luteal phase; 7-10 days after ovulation. Note that no two bbt charts will be identical. To help, we've been having crazy amounts of sex. Even with a slow rise, a temperature pattern usually becomes apparent after a few days. I've had a typical bbt … Anyone willing to check my chart out and give me advice maybe? BBT BBT experts: Peak OPK but no temp rise? BBT Is there a chance of getting pregnent immediately after the periods was 7 days late got it now when do I ovulate? I never got on with OPKs, I never got a positive as I think I peak really quickly and they just stressed me out but have got pregnant 3 times with BBT. Basal body temperature is a great way to help track ovulation to both plan and avoid pregnancy. BBT