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: x240 when printed at 10cm wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Anne Weston, EM STP, the Francis Crick Institute |
Bildgröße: | 4062 px × 3219 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
|