The former is false labor/contractions, sometimes experienced by pregnant women late in their pregnancies.
The latter is apsychological typing system (MBTI-Myers-Briggs Type Indicator), which is the mechanism for the latest entry into the field of online dating, Jewish Types.

Aryeh, co-founder of both this site and the extremely helpful JRant, writes:
The system helps you identify your MBTI type aswell as the type you are attracted to. The system then matches you with a person that fits your attraction type but also satisfies the requirement they you happen to be also be their attraction type. I personally think that this site can be extremely revolutionary as to how people are matched up. The fact is, that even if you aren’t attracted to the person the site sends you, you will nevertheless feel an instant connection and feel comfortable with the other person because not only do you inherently like their type, they inherently like yours! So whether you walk away with a true soulmate or not, you should definitely walk away making some really close friends.

There is no cost to join, but if you don’t know your type, it could take a half hour or so to determine what type you are, and to which type you are attracted. It took me a while to determine that I’m probably an ENFP (Extroverted, Intuitive, Feeling Perceiver) attracted to an ESFP (Extroverted, Sensing, Feeling Perceiver). I say probably because I felt some of the choices I was given in order to determine those letters were too close to call. You’ll see what I mean when you take the test.

If you have feedback for Aryeh, feel free to share it with him. If you have a great experience, share it with J.A.