Sentences with word «fertilise»

For identical twins, it still depends on the time of the split of fertilised egg.

It's not clear why a conquering male might refrain from destroying existing eggs, although they might offer eggs fertilised by the new male a better chance of survival if a predator attacks the nest.

While sperm stem cells have two sets of chromosomes, mature sperm capable of fertilising eggs have only one set.

The case attracted widespread media attention, especially when Manny's mother, Leslie Maresca, announced that she would be proud to carry a donor egg fertilised with Manny's sperm if Pam decided not to use the sample.

Both groups received donated eggs, and in both groups about a third of the attempts at transferring embryos fertilised in a test tube led to pregnancy.

We therefore concluded that the presence of multiple micropyles increases the opportunity for post-copulatory choice about which sperm fertilises the egg.

The authors used abnormally fertilised embryos, presumably because they did not want to be accused of using embryos that could undergo development to term if implanted.

His aim from the outset was to find a way of fertilising human eggs outside the body then returning them to the womb.

After that, the female lays her eggs, which are then fertilised by the sperm trickling down her back.

Your article on fertilising crops with human sewage omitted one key point (16 February, p 48).

This prevents more than one sperm cell from fertilising the same egg, creating a genetic imbalance.

Waste products from the fish fertilise plants, while vegetable waste and worms from the gardens feed the fish.

We shouldn't pooh - pooh the idea of fertilising crops with our urine and faeces, says Fred Pearce — it's safer than it sounds and the benefits would be huge

Prof Robin Lovell Badge, Crick Institute, on the science: «The experiments reported by Junjiu Huang and colleagues (Liang et al) in the journal Protein Cell on gene editing in abnormally fertilised human embryos are, I expect, the first of several that we will see this year.

Cryptic female choice involves females using physical or chemical mechanisms to control which male fertilises their eggs after mating, and is known to occur in a number of species.

Of note, the researchers concentrate on the more ethically challenging pronuclear transfer (PNT) which uses fertilised eggs, rather than maternal spindle transfer (MST) where the egg is unfertilised.

Scientists are also able to track individual proteins as fertilised egg cells divide.

What's more, the resulting «clean meat» won't have come from animals treated with antibiotics, or grazed on chemically fertilised soil, nor will the meat have been contaminated with anything undesirable in a slaughterhouse.

Once fertilised, the egg cell becomes the embryo while the central cell becomes the endosperm that nourishes the embryo.

The method approved in the UK is called pronuclear transfer and involves fertilising both the mother's egg and a donor egg with the father's sperm.

With respect to the possibility of using PNT clinically, it was essential that they explore the methods in normally fertilised eggs, which they have now done.

Male flower parts, or stamens, produce pollen that fertilises female parts, known as pistils, to make seeds.

Research in animal species such as mice and sheep has shown that factors secreted by the endometrial glands are critical for enabling a developing fertilised egg (known as the «conceptus») to implant into the wall of the uterus.

Professor Paul Fowler of the University of Aberdeen, who coordinated the $ 2.9 m study funded by the European Commission, said: «The biggest effects on the fetal ovary were seen when the sheep were switched to sewage sludge fertilised fields in the last two to three months of pregnancy.

The fecundity of industry is one of the good fruits of the modern turn towards the world, a turn that has also fertilised many weeds of social and spiritual decay.

They then injected the amalgam of the two foreign genes into fertilised mouse eggs, producing eight transgenic mice.

Mouse embryonic stem cells are capable of differentiating into male and female germ cells in vitro and putative primordial germ cells (PGC's) derived in this way contribute to spermatogenesis when transplanted into the adult testis and are capable of fertilising oocytes in vitro.

He adds that this particular proposal may have fewer unwanted consequences than other proposals to «geo - engineer» the climate, such as fertilising entire oceans with iron filings.

In his letter on ocean thermal energy conversion (OTEC), Graham Cox suggests it could be used to fertilise surface waters with nutrient - rich deep water to promote plankton growth for carbon capture (1 December, p 31).

In fact, the authors show that males with a medium - length processus are the most likely to successfully fertilise a female.

Sewage sludge contains large amounts of nitrogen and phosphorus that can fertilise tree growth, says the authority, which is the regulatory arm of the Forestry Commission.

Caution should be exercised in collecting this weed in the wild, because when growing in heavily fertilised agricultural fields the plant can accumulate dangerously high concentrations of nitrates.

There is also evidence that tropical forests in both the Americas and Africa occupy ground that farmers fertilised with manure no later than 2500 years ago.

If you keep picking off the pods, the plant will try to produce more assuming it has enough nutrients to do so hence the need for correct fertilising just prior to the fruiting stage.

They entered this agreement with that little fertilised egg that stated they'd only stay inside for 40 weeks.

The opposition have done their gardening job well, carefully cultivating that grassroots opposition and trying to fertilise dissent on the government's benches.

The most promising contraceptive is porcine zona pellucida (PZP), which causes a mare's immune system to attack fertilised eggs.

Did plasma jets squeezed from black holes fertilise the gas clouds that gave birth to stars?

Twenty healthy mouse pups were born after fertilised eggs from the treated ovaries were implanted into surrogate mothers (Proceedings of the National Academy of Sciences, DOI: 10.1073 / pnas.1001198107).

Fishel's team filmed 88 newly fertilised eggs from 69 couples in their incubator until they become blastocysts — the small ball of cells that is implanted into the womb.

The researchers believe the hammerhead shark reproduced by a type of asexual reproduction called automictic parthenogenesis, whereby an unfertilised egg is activated to behave as a normal fertilised egg by a small, nearly genetically identical cell known as the sister polar body.

By fertilising plankton blooms that lock away carbon dioxide, iron - laden dust seems to have been the planet's main thermostat for the past 4 million years.

The study by British and French scientists from the universities of Nottingham, Aberdeen (UK) and Paris - Saclay (France), The James Hutton Institute (Aberdeen) and UMR BDR, INRA, Jouy en Josas (Paris, France) published in the journal Scientific Reports, has shown striking effects of exposure of pregnant ewes — and their female lambs in the womb — to a cocktail of chemical contaminants present in pastures fertilised with human sewage sludge - derived fertilizer.

The study analysed fertility outcomes such as number of eggs retrieved, number fertilised, number of embryos created, implantation rate and live birth rate, which was the main outcome measure in the study.

Flowers need pollinators to collect and transport pollen to fertilise other flowers and trigger fruit and seed production.

The bill allows frozen fertilised eggs to be kept for no longer than five years, and for so - called «spare» embryos from IVF to be given to other couples.

After separation of the solid fraction, the released phosphate dissolved in the liquid fraction can be precipitated as magnesium ammonium phosphate and calcium phosphate, which in turn are directly usable as high value fertilising salts.