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(61) Whatever the circumstances, it is standard practice in embryo transfer to introduce several embryos at a time.

(62) Elevated progesterone levels mimic pregnancy and this delays ovulation, prevents fertilisation or stops implantation of the embryo in the womb.

(63) Curled tight like an embryo that doesn't want to be born, like a baby who's had too much pain.

(64) The growth of the human embryo recapitulated the history of animal life as revealed by the fossil record.

(65) This system allows direct comparison of contralateral limbs from a given embryo, controlling for variability among embryos and culture conditions.

(66) Once development begins, the embryo divides rapidly and each mitosis seems to be associated with an increase in calcium.

(67) Cells can also change shape, exert forces, and move from one place in the embryo to another.

(68) The number of cell divisions in the early embryo that are controlled by the cytoplasm varies from species to species.

(69) This appears very early in development,[Sentencedict] when it is involved in compaction of the eight cell embryo and cell polarisation.

(70) It is possible to rearrange the cells of the early mouse embryo in numerous combinations and normal development will still occur.

(71) Among recent subjects have been council house sales, public attitudes to embryo research and the effects of unemployment on young women.

(72) Then, with luck, some of the reintroduced, transformed cells will differentiate to form germ cells in that embryo.

(73) Specifically, embryo screening has made it possible for families to sidestep their genetic fates.

(74) In a way, we are witnessing the second coming of Graham Gooch[sentencedict.com], the flowering of an unfulfilled embryo.

(75) A typical half embryo was seen to emerge just as if an older embryo had been sliced in two with a razor.

(76) Movements occur simultaneously over many parts of the embryo with sheets of cells streaming past each other, contracting and expanding.

(77) This hormone is produced by the developing embryo within a few days of the egg being fertilised.

(78) Note that his method of producing clones was irreducibly simple: just breaking an embryo apart.

(79) As the cup grows out, it comes into contact with the outer cell layer of the head of the embryo.

(80) One can, looking down the microscope, observe the behaviour of individual cells as the embryo develops.

(81) Genes only start to mean something when they are translated, via protein synthesis, into growing-rules for a developing embryo.

(82) Suppose it simply killed off its opposite number, the one that came from the other grandparent of the embryo.

(83) Precious quality Whether the timing of this programme was influenced by the current debate on embryo research, I do not know.

(84) Alternatively the embryo culture dishes can be placed in sealed flasks pre-equilibrated with a mixture of 5% CO2 in air.

(85) Some go around shaking the eggs to kill the embryo goslings.

(86) However, removing the stem cells kills the embryo, and therefore has serious ethical implications.

(87) When first formed the embryo is only half a millimetre long, and bears no resemblance to its future form.

(88) He produced bigger clones by embryo splitting, once deriving a set of quin lambs from an eight-cell embryo.

(89) These cells then migrate to many different parts of the embryo.

(90) Who is really winning will not be known before the free vote on the embryo Bill in the new year.