Contraceptive pills. Pack of oral contraceptive pills used for birth control. Here,different colour pills are taken at different times of the menstrual cycle. Dates and instructions are present on the reverse side of this silver pill pack to ensure that the correct daily dose is taken. The contraceptive pill contains one or more synthetic female sex hormones,most containing oestrogen and progesterone combined. Progesterone acts on the pituitary gland affecting the menstrual cycle; oestrogen blocks the monthly release of a mature egg (ovulation). The pregnancy rate when using the contraceptive pill is on average less than 1 per 100 woman years | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Tek Image |
Taille de l’image : | 2418 px × 3186 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |