BBT and central heating

[housequery]

With the cold weather now, our heating comes on at 5am, I get up at 6.15 so had some time to be "warmed up" as it were. I've noticed my cover line is much higher now, has anyone else spotted similar?

Nb: not ttc , already have two daughters but I use opks and temping as contraception.

No experience of this as such, but just wanted to make sure you’re aware that temping isn’t the most reliable method of contraception. I’m sure you know this, but just wanted to mention...

I got pregnant while using natural cycles, only dtd once that month as DH was travelling (supposedly 4 days post ov) and if you read the literature, natural cycles actually explicitly state that their app should only be used by people for whom a pregnancy wouldn’t be the end of the world!