When a couple is trying to conceive it's easy for a woman to become obsessed with when she's ovulating.
Now a new internally worn device promises to boost the chance of falling pregnant by providing the most accurate information ever about when ovulation will occur.
The OvuSense is a tampon-shaped device which sits in the vagina and records subtle changes every five minutes overnight. That information is then downloaded via the OvuSense app once the device is removed in the morning, creating an accurate picture of a woman's cycle.
The device, launched by UK firm Fertility Focus, gives a woman 24 hours' advance notice of when ovulation is likely to occur.
"In a crowded market for fertility trackers, we set out to make OvuSense completely different," Fertility Focus CEO Rob Milnes said.
"Unlike any other product, OvuSense provides 24 hours' advance notice of ovulation - with clinically proven 96 per cent correct results, and 99 per cent accurate detection of the exact date of ovulation."
Fertility nurse Kate Davies said OvuSense monitors a woman's core temperature and provides a direct indication of the progesterone released during ovulation.
"That's helpful for all women, especially the 70 per cent of women trying to conceive for more than six months who suffer with ovulatory issues," she said.
The device is also marketed for women with polycystic ovarian syndrome, as OvuSense creators say it can help identify ovulation even in those who traditionally have trouble with predictor kits.
There is no doubt those trying to conceive would welcome the information provided by OvuSense, but it does not come cheap: the device, which can be purchased from the OvuSense website, retails for $595.
While experts agree ovulation tracking kits can be helpful when trying to fall pregnant, couples should seek medical advice it they are in any way concerned about their ovulation.
If you're worried you're not ovulating, or if you have other concerns, see your GP for a fertility assessment and referral to a gynaecologist if needed.
You may need further investigations if you've been trying to conceive through regular unprotected sex for more than 12 months if you're younger than 35, or more than six months if you're over 35.