Does the use of cosmetics during breastfeeding affect the baby?

Patient's question:

I got married last year. Recently, I've been experiencing lower abdominal pain, especially during my period. I'm very worried about it affecting my fertility, and I'm also extremely sensitive to cold and coldness. Could you please tell me if using cosmetics during breastfeeding affects the baby?

Doctor's answer:

It's best not to wear makeup during breastfeeding, as cosmetics are made of chemical ingredients that can be absorbed by the baby through breast milk. Once the baby is weaned, you can start wearing makeup. For the sake of the baby's health, mothers need to make sacrifices.
The ovulation period starts from the first day of the next menstrual period. Counting backward 14 days or subtracting 14 days from that day gives you the ovulation day. The period from 5 days before the ovulation day to 4 days after it is called the ovulation period.
If your menstrual cycle is irregular, the formula for calculating the ovulation period is as follows:
- First day of ovulation period = Shortest menstrual cycle days - 18 days
- Last day of ovulation period = Longest menstrual cycle days - 11 days

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