Definition of preconceptional in English:
preconceptional
adjective ˌpriːkənˈsɛpʃ(ə)n(ə)lˌpriːkənˈsɛpʃən(ə)l
Occurring or existing before conception.
Origin
Early 20th century; earliest use found in The British Medical Journal. From pre- + conception + -al.