1.   Reduced to just the haploid maternal complement of chromosomes, the egg develops into a male.

2.   The eggs develop there, and as the theory predicts, it is the female sea horse who courts the male.

3.   It remains difficult to get reconstructed eggs to develop into embryos and many of these embryos show abnormalities.

4.   Numerous eggs could develop into multiple fetuses if fertilized, her doctor said.

5.   The process can identify and sort sperm into the two types that determine whether a fertilised egg develops into a male or a female embryo.

6.   When the egg has developed into an early embryo, scientists derive embryonic stem cells, which could be converted into particular body tissues for use in patients.

7.   Eggs then developed according to the timetable of whatever species donated the genes, First said.