I was working nights as a head nurse in a psychiatric hospital. Around 1:00am a working nursing assistant started to c/o severe abdominal pain. The pain was so bad the aide could not stand; in fact she became incontinent. I was joined by two other R.N.s and the three of us started to assess the problem. A 22 yo white obese, nursing assistant, relatively new to the job. The pain was reported to be a 10 out of 10; BP 138/90 (Normal for her)T.98.6; P88; R20. Our patient became exteremely anxious as the pain increased, and she started to experience a great deal of lower abdomial pressure. When asked about her LMP, she stated she was never regular so she couldn't tell us her LMP. We asked if she could be pregnant. She said that would be impossible. She "defineately was not pregnant". As we waited for the ambulance to arrive she was "incontinent" again. We determined he 'water' broke and we were witnessing an impending birth. The three of us prepared for a delivery as the 'patient' insisted she was not pregnant; right up until she delivered a very healthy babay boy. By the time the ambulance showed up we had delivered the baby, placenta and everyone was cleaned and sleepy. That baby boy should be about 39 now.