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. 2015 Oct 1;18(5):422–436. doi: 10.1089/rej.2014.1656

Table 1.

Membrane Permeability Coefficient Times 10−5 cm/sec for Human Red Blood Cells, Human Sperm, and Human Oocytes

Cryoprotectant Red blood cells@4°C38 Sperm @22°C91 Oocytes @22°C92
Methanol 11.35    
Formamide 8.05    
Ethylene glycol 3.38 13.2 1.95
Propylene glycol 1.79 3.83 3.83
Dimethyl sulfoxide 1.30 1.33 2.60
Glycerol 0.58 3.50 Low