“Fertilization” or “Fertilisation”—What's the difference?

Usage by country

Where each spelling is used

Of the 12 countries below, 10 prefer “fertilization” and 1 prefer “fertilisation”. Usage levels are out of 100; the more common spelling in each country is in bold.

Usage level out of 100 (if available).
Country	fertilization	fertilisation	Preference
United States	99	1	“fertilization”
United Kingdom	50	50	No clear preference
India	87	13	“fertilization”
Philippines	99	1	“fertilization”
Canada	85	15	“fertilization”
Australia	48	52	“fertilisation”
Liberia	100	0	“fertilization”
Ireland	56	44	“fertilization”
New Zealand	53	47	“fertilization”
Jamaica	91	9	“fertilization”
Trinidad & Tobago	87	13	“fertilization”
Guyana	100	0	“fertilization”

Usage

Examples in context

Real sentences for each spelling. Hover an example to copy it.

“fertilization”

Human fertilization
…is found between female extra-pair fertilization frequencies and the overall heterozygosity…
…greater the chances of successful fertilization.
…making it appear as though fertilization occurred without sperm (i.e.
…of offspring is determined by fertilization rather than the assortment of…
…the process of in vitro fertilization (IVF).
Polygyny and fertilization success in red flour beetles
If fertilization is possible between two species…
…anaphase in meiosis (II) signifying fertilization.
…the development of in vitro fertilization, a technological advance that has…

“fertilisation”

…using birth control to prevent fertilisation, thereby inhibiting the replication of…
…to his partner's gonopore and fertilisation is internal.
After fertilisation, the eggs hatch and the…
…frog (Ascaphus truei) exhibits internal fertilisation.
…can be presumed, that the fertilisation of Bathynerita naticoidea is internal.
…liberated into the sea and fertilisation is external.
Fertilisation however takes place in the…
…Richard Henderson, pioneer of in-vitro fertilisation Robert Edwards.
…act as an instigator for fertilisation.
…with uniseriate paraphyses, and upon fertilisation, swells to 5–7 mm long.

Examples are Wikipedia snippets under the CC ShareAlike 3.0 license.

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