The term foetal circulation is identified in base64 scheme by the sequence Zm9ldGFsIGNpcmN1bGF0aW9u, while the MD5 signature is equal to ea9d40d7566368cb8e7fa0f55cae4741. The ASCII encoding of foetal circulation in hexadecimal notation is 666f6574616c2063697263756c6174696f6e.