畏缩
发表于 2025-3-28 14:41:07
D. J. Begley BSc, PhD,J. A. Firth MA, PhD,J. R. S. Hoult BA, PhD
食草
发表于 2025-3-28 21:13:28
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障碍物
发表于 2025-3-28 23:23:35
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难解
发表于 2025-3-29 03:09:08
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DENT
发表于 2025-3-29 07:42:15
Implantation and Establishment of the Conceptus,f the embryo’s mitochondrial DNA is therefore maternal. This condition persists for the entire life span of the new individual. In addition other molecules of shorter life such as some RNA and proteins are derived from the egg. Thus much of the metabolic activity and initial behaviour of the zygote depends entirely on molecules of maternal origin.
sigmoid-colon
发表于 2025-3-29 14:43:44
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CANON
发表于 2025-3-29 18:28:33
The Female Reproductive System,ed by menstrual bleeding. The human cycle, conventionally numbered from the first day of menstruation, has an average length of 28 days and is repeated until an egg is fertilised. Ovulation occurs at mid-cycle, usually day 14, and if fertilisation occurs implantation usually begin bout 7 days later.
Irksome
发表于 2025-3-29 20:55:15
The Male Reproductive System,e testis. The formation of male gametes, spermatogenesis, within the seminiferous tubules is also continuous and their maturation proceeds as they move through the different regions of the testis and epididymis.
是贪求
发表于 2025-3-30 01:10:33
Reproductive Failure and Wastage,that human reproduction is fallible and that conception does not automatically result in the birth of a live and healthy infant. The causes of failure and the inefficiencies of the human reproductive process are discussed in this chapter, with special emphasis on those developmental errors which give rise to abnormalities of the newborn.
Chromatic
发表于 2025-3-30 04:48:06
Growth, Puberty and Ageing, first approach to the detailed biological analysis of growth. In this sense, growth is usually taken to exclude temporary fluctuations in otherwise stable dimensions due to accumulation of fat or water.