Sentences with phrase «becomes after fertilization»

If the pregnancy becomes after fertilization of one egg you will have identical twins, if the ovulation is dual, you will have fraternal twins.

Not exact matches

Human chorionic gonadotropin first becomes detectable in the mother's blood and urine around 6 and 14 days after fertilizations (3 to 4 weeks gestational age)[11 - 13].

ECPs are a regimen of hormone pills that can prevent pregnancy after unprotected intercourse by temporarily blocking ovulation, interfering with fertilization, or thinning the lining of the uterus to keep a fertilized egg from becoming implanted.

This problem can become even bigger for biofuels like corn ethanol that emit greenhouse gases at every step, from laughing gas emanating from corn fields after fertilization to the CO2 from the fermentation of kernels into ethanol.

Once the two packets of DNA meld into one complete set of 46 chromosomes, the one - celled embryo begins to cleave, or divide, becoming a two - celled embryo at around 22 to 28 hours after fertilization, four cells another day later, and eight cells around day three.

This zygote divides and re-divides as it drifts toward the uterus, becoming a blastocyst on the fifth day after fertilization.