Results of DHAS-tests are calculated according to 4 methods (recovery of injected DHAS as total oestrogens measured in 24 hour urine specimens; changes of oestrogen excretion peaks measured in two hour intervals; recovery of injected DHAS as total oestrogens measured in 2 hour urine specimens; classification according to a scheme of oestrogen excretion pattern measured in two hour intervals). The results are critically compared with the general development of pregnancy and with the condition of the newborn. The discrepancies observed show that the DHAS-test is of little practical value.