Human saliva displaying ferning, light micrograph (LM). During the fertile phase of a women's menstrual cycle an oestrogen surge causes salt crystals to appear in the saliva. When viewed under a microscope the crystalline salt structure resembles fern leaves and can be used as an indication of a woman's increased chances of conceiving with ovulation commonly occurring within 24-48 hours of strong salivary ferning presence. Magnification: x67.5 when printed at 10cm wide | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Anne Weston, EM STP, the Francis Crick Institute |
Taille de l’image : | 3286 px × 3216 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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