![](https://image.tmdb.org/t/p/original/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![](https://image.tmdb.org/t/p/w342/uX8pic7asQBdnwMB9QjPvTsn1Dw.jpg)
Adam or Eve?
This episode of Horizon investigates the role that hormones play in the stages of mammalian sexual development.
Release Date: 1964-02-04
Seasons: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021
Seasons: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021
TMDb:
7.4/10
- Country: GB
- Language: English
- Runtime: 60
![](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![](https://image.tmdb.org/t/p/w300/5UmJ5x6kN24lDtu3w9qzogPsxPX.jpg)
![](https://image.tmdb.org/t/p/w300/w66Hk775BrbycSEEh8kDy3VQfEd.jpg)
![](https://image.tmdb.org/t/p/w300/iyf6Do10UgagqoxM26mjok9A7ri.jpg)
Other episodes for this season
![A Matter of Self-Defense](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![Bird Brain - The Mystery of Bird Navigation](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![Never Too Late to Learn](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![The Great Fish Hunt](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![Pedal Power](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![The Writing on the Wall](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![Where Did the Colorado Go?](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![The Future Goes Boom](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![Fusion: The Energy Promise](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![The First Ten Years](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![This Yankee Dodge Beats Mesmerism Hollow](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![The Hunting of the Quark](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![A Noah's Ark for Europe](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![Bridges: When It Comes to the Crunch](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![Search for Life](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![The Secrets of Sleep](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![Who Needs Skills?](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![Hills of Promise](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![The Race for the Double Helix](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![The Immigrant Doctors](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![Mines, Minerals and Men](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![What Price Steak?](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![Listen and Be Loyal](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![Adam or Eve?](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![An Unholy Scramble](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![Do as You Are Told](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![The First Signs of Washoe](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![The Other Way](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![The Greatest Advance Since the Wheel?](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![Joey](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![The Neglected Harvest](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![How on Earth Did They Do That?](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)
![The Lysenko Affair](https://image.tmdb.org/t/p/w300/8y8ajNyXXTcFdpiLyJXbXoztwmA.jpg)