Daily prolonged periods of very low calorie intake (700-800 calories) with no carbs can signal the body to lower hormones and metabolic rate, potentially preventing pregnancy.

“keto ketosis was a backup source of fuel like it it was meant for if we were in a famine and there was not a lot of food around our bodies had to be able to burn ketones for energy backup and so what what are you telling your brain what are you telling your hormonal system when you're eating one to two meals a day which would maybe be what seven 800 calories that you're and you're doing this every single day and no carbs and so your adrenaline's running high your cortisol is running high every day and you're in a caloric deficit and you're not eating enough what does that tell you what does that tell your body it says do not get pregnant lower your hormones lower your metabolic rate because we cannot get pregnant right now because we can't sustain a baby”