Reproductive toxicity associated with the use of nanoparticles (NPs) in imaging probes and drug delivery has become a concern, although detailed information on the reproductive toxicity of NPs is still limited. At present, most research within the reproductive and developmental toxicity of ENP must be categorized as hypothesis-generating rather than directed towards risk assessment. Future research ought to address more systematically the reproductive and developmental toxicity of nanomaterials. Essential goals of research in reproductive and developmental toxicity of ENP must be to: (1) identify most sensitive end-points; and (2) to deduce general rules as to the relative role of, for example, particle size and surface area, surface chemistry, core material, and route of exposure. Citations are important for a journal to get an impact factor. Impact factor is a measure reflecting the average number of citations to recent articles published in the journal. The impact of the journal is influenced by impact factor, the journals with high impact factor are considered more important than those with lower ones. To increase the visibility and ease of use of open access scientific and scholarly journals PrimeOA Publications top online publishing journals are indexed in different indexing and archiving services.