Words to Describe embryos

How embryos often is described ("________ embryos")

• extra
• cultured
• nuclear
• globular
• secondary
• excised
• parthenogenetic
• dead
• cryopreserved
• amphibian
• mammalian
• deficient
• infected
• immature
• cloned
• type
• excess
• old
• experimental
• homozygous
• spare
• implantation
• zygotic
• young
• somatic
• twin
• ciliated
• viable
• chick
• normal
• advanced
• fresh
• null
• healthy
• adventitious
• derived
• fewer
• injected
• live
• mutant
• vertebrate
• identical
• diploid
• defective
• chimeric
• ascidian
• malformed
• intact
• tetraploid
• frozen
• avian
• tiny
• double
• older
• planetary
• abnormal
• stage
• younger
• transgenic
• hybrid
• day
• haploid
• male
• female
• mature
• filarial
• treated
• early
• cell
• human
• thawed
• developed
• dormant
• multiple
• isolated