Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxn!ihnp4!qantel!lll-lcc!lll-crg!seismo!brl-adm!brl-smoke!gwyn
From: gwyn@brl-smoke.ARPA (Doug Gwyn )
Newsgroups: net.sci
Subject: Re: Biorhythms
Message-ID: <335@brl-smoke.ARPA>
Date: Sun, 27-Apr-86 23:58:46 EDT
Article-I.D.: brl-smok.335
Posted: Sun Apr 27 23:58:46 1986
Date-Received: Fri, 2-May-86 22:42:15 EDT
References: <935@cylixd.UUCP> <719@bentley.UUCP> <3435@hplabsb.UUCP>
Reply-To: gwyn@brl.ARPA
Organization: Ballistic Research Lab (BRL)
Lines: 8

In article <3435@hplabsb.UUCP> bl@hplabsb.UUCP (Bruce T. Lowerre) writes:
>Is it just coincidence that the average human menstrual cycle equals the
>lunar cycle?

I don't know, but I can tell you how to find out:  Examine analogous
cycles in other species.  If virtually all of them track the lunar
cycle, then I would say there is an (unknown) causal connection;
otherwise it would appear to be coincidental.