The fish farming industry has been more focused on the quality of eggs or larvae rather than that of sperm, even though the quality of both gametes may affect fertilisation success and larval survival. In some species, poor sperm quality can be a limiting factor in their culture, however, even when fertilisation success is high, differences in sperm quality between males when mixed sperm from m...

Suspended sediment from dredging activities and natural resuspension events represent a risk to the reproductive processes of coral, and therefore the ongoing maintenance of reefal populations. To investigate the underlying mechanisms that could reduce the fertilisation success in turbid water, we conducted several experiments exposing gametes of the corals Acropora tenuis and A. millepora to t...

1. Nutrient resource availability and host-plant foliar pubescence both influence arthropod food webs, but multifactor studies are needed to understand their interdependence and relative importance. Arthropods were sampled by clipping foliage from Metrosideros polymorpha (Myrtaceae) trees of pubescent, glabrous, and intermediate leaf forms on fertilised and unfertilised plots. 2. Fertilisation ...

While early success rates using in vitro fertilisation ranged from 10% to 15%, improved technology has more than doubled that rate, owing to the availability of recombinant follicle-stimulating hormone, improved ovarian stimulation protocols, and assisted fertilisation technology. This latter technology has already revolutionised the management of male-factor infertility. The future goal is to ...

Molar pregnancies can be subdivided into complete (CM) and partial moles (PM) based on genetic and histopathological features. Complete moles are diploid and androgenic in origin, with no evidence of fetal tissue. Complete moles usually (75–80%) arise as a consequence of duplication of a single sperm following fertilisation of an ‘empty’ ovum. Some complete moles (20–25%) can arise after disper...

Family planning methods that act when administered after fertilisation would have substantial benefits: they could be used longer after sex than current emergency contraceptives, and potentially a woman could use them only on relatively rare occasions when her menstrual period is delayed. Although such methods would displease abortion opponents, they would likely be welcomed by many women. Rese...

Soil organic ma�er and its turnover rate are key parameters for agricultural management practice as well as for environmental issues. In a field experiment comparing organic (compost) and mineral fertilisation and combinations of both the amount of inorganic nitrogen in the soil and the nitrogen uptake by the plants were measured. Considering these data and the fertilisation practice the net N-...

Approximately 10-15% of the married couples remain childless. Conventional in vitro fertilisation (IVF) has been the treatment option for most of these cases. However, it is expensive and only available to a small fraction of the infertile population. The Sindh Institute of Reproductive Medicine (SIRM), Karachi, Pakistan, has introduced a new method of IVF for the first time in Pakistan. Intrav...