Words to Describe fertilizations

How fertilizations often is described ("________ fertilizations")

• such
• organic
• polyspermic
• successful
• interspecific
• simultaneous
• many
• experimental
• more
• fewer
• innumerable
• reciprocal
• artificial
• abnormal
• separate
• cross
• possible
• successive
• future
• independent
• self
• pure
• vitro
• subsequent
• random
• multiple