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INTER-SPECIES FERTILITY

Table A: Relationships

Relationship	Example
Identical	human vs. human
Similar	human vs. elf, human vs. halfling
Related	human/horse vs. centaur, human/elf vs. half-elf
Different	human vs. eagle, human vs. horse

Whether or not two individuals can produce offspring depends on the relationship and conditions given in Table B.

Table B: Relationships Based on Conditions

Relationship:	Identical
Additional Requir.:	None
Chance of Fertility:	As normal
Result:	As per race
Relationship:	Similiar
Additional Requir.:	None
Chance of Fertility:	As the lesser fertile of the two races
Result:	Half Breed
Relationship:	Realted
Additional Requir.:	None
Chance of Fertility:	As the lesser fertile of the two races
Result:	Produce pure breed of the race the size of the female (see below)
Relationship:	Different
Additional Requir.:	Magical or divine intervention
Chance of Fertility:	0% (without intervention) or 100% (with)
Result:	Produce a new race that may be fertile and breed true

Size (of the creature you filthy minded churl) may play a part in some crossbreeds. For example, in human/horse/centaur pairings. The result depends, in part, on the physical size of the parents. Consult Table C.

Table C: Size

Realtionship	Race of Father>	Race of Mother	Race of child
Similar	Human (Elf>	Elf (Human)	Half-elf
Related	Human (Half-elf)	Half-elf (Human)	Human or Half-elf
Realted	Elf (Half-elf)	Half-elf (Elf)	Elf or Half-elf
Different	Human	Horse	Centaur (with interv.)
Different	Horse	Human	None (or a dead woman)
Related	Human (Centaur)	Centaur (Human)	Human
Realted	Horse (Centaur)	Centaur (Horse)	Horse

There is one interesting exception, humans and halflings. While they are fertile with each other, such a pairing will only produce one or the other race. This may be because they are so similar that there can be no half breed race. Consult Table Cb.

Table Cb: Halfling-Human Size

Relationship	Race of Father	Race of Mother	Race of Child
Similar	Human	Halfling	Halfling
Similar	Halfling	Human	Halfling or Human

For some specific races, the relationships are given on Table D.

Table D: Specific Races

Race	Relationship	Examples
Centaur	Similar	None
	Related	Horse, Human
	Different	Most other races
Elf	Similar	Elf (all varieties)
	Related	Drider
	Different	Most other races
Half-elf	Similar	None
	Related	Elf, Human
	Different	Most other races
Centaur	Similar	Elf, Halfling, Ogre, Orc (and variations)
	Related	Centaur, Half-elf, Half-orc, Minotaur, Satyr
	Different	Most other races

On the specific case of and elf and a centaur use the following suggested rules:

• Elves and centaurs relate as "different", therefore there is no fertility without intervention.

• Elves are "similar" to humans who are "related" to centaurs, but this two part relationship still translates into "different".