Kunezici eziningi ezithinta ukuthuthukiswa ngokomzimba:
1. Ezempilo.
2. Imvelo yangaphandle.
3. imfundo yezemvelo.
4. Ukuthobela umbuso wosuku.
5. Ukudla okunomsoco.
6. Ukuzikhandla.
7. Ukuhlelwa kwesimo se-Hereditary.
Isisindo somntwana osanda kuzalwa sishayela ngu-2500-3500 gm. Ngakapheli unyaka owodwa wokuphila, isisindo somzimba wengane sisanda ngokushesha. Ngonyaka kufanele kube kathathu.
Amanani ajwayelekile okwenyuka kwesisindo ngenyanga ngayinye yengxenye yokuqala yonyaka yi: hm:
Inyanga yokuqala - 500-600
Inyanga yesibili - 800-900
Inyanga yesithathu - 800
Inyanga yesine - 750
Inyanga yesihlanu - 700
Inyanga yesithupha - 650
Inyanga yesi-7 - 600
Inyanga yesishiyagalombili - 550
Inyanga yesishiyagalolunye - 500
Inyanga yeshumi - 450
Inyanga le-11 - 400
Inyanga yeshumi nanye ngu-350.
Okungenani inzuzo yesondlo yanyanga zonke phakathi nonyaka wokuqala wokuphila ingathathwa ngefomula:
800 g - (50 x n),
Isisindo somzimba ngonyaka wokuqala wokuphila singanqunywa ngufomula;
Ezinyangeni eziyisithupha zokuqala zalolu fomula, isisindo somzimba ngu:
mass ngesikhathi sokuzalwa + (800 x n),
lapho n inomboro yezinyanga, u-800 yi-average isilinganiso senzuzo yenyanga ngenyanga yokuqala.
Ngxenye yesibili yonyaka isisindo somzimba ngu:
mass ngesikhathi sokuzalwa + (800 x 6) (ukuzuza kwesisindo okwengxenye yokuqala yonyaka) -
400 g x (n-6)
lapho u-800 g = 6 - isisindo sokwanda kwesigamu sokuqala sonyaka;
n iyineminyaka ezinyangeni;
400 g - inzuzo yesilinganiso senyanga yesibini yonyaka.
Ingane eneminyaka eyodwa ubudala inesisindo esingu-10 kg.
Emva konyaka wokuqala wokuphila, izinga lokukhula kwesisindo somzimba lancipha kancane kancane, ukwanda kuphela ngesikhathi sokukhulelwa.
Isisindo somzimba wengane eneminyaka engama-2-11 engadluliselwa kungatholakala ngokuthi ifomula:
10 kg + (2 x n),
lapho n iyinani leminyaka.
Ngakho-ke, ingane eneminyaka engu-10 kumele isisindo:
10 kg + (2 x 10) = 30 kg.
Ukuphakama (ubude bomzimba).
Ezinyangeni ezingu-3, ukuphakama okulinganiselwa ku-60 cm. Ezinyangeni ezingu-9, 70 cm, ngonyaka-75 cm wabafana no-1-2 cm ngaphansi kwamantombazane.
1, 2, 3 - inyanga ngayinye ye-3 cm = 9 cm.
4, 5, 6 - njalo ngenyanga nge-2.5 cm = 7.5 cm.
7, 8, 9 - njalo ngenyanga ngo-1.5 cm = 4.5 cm.
10, 11, 12 - nyanga zonke nge-1 cm = 3 cm.
Ngenxa yalokho, ngokwesilinganiso ingane ikhula ngo-24-25 cm (74-77 cm).
Izingxenye ezihlukene zomzimba wengane zikhula ngendlela engalingani, iningi liyizitho ezingezansi, ubude balo buyanda kathathu phakathi nesikhathi sokukhula, ubude bezitho ezingenhla izikhathi ezine, isiqu izikhathi ezintathu, nokuphakama kwentloko izikhathi ezingu-2.
Isikhathi sokuqala sokukhula okujulile kwenzeka eminyakeni emi-5-6.
Ukwandiswa kwesibili kungu-12-16 iminyaka.
Ukuphakama kwesilinganiso kwengane engaphansi kweminyaka engama-4 kunqunywe ifomula :
100 cm-8 (4-n),
lapho n inomboro yeminyaka, u-100 cm ukukhula kwengane eminyakeni engama-4.
Uma ingane ingaphezu kweminyaka engama-4 ubudala , ukukhula kwayo kufana nalokhu:
100 cm + 6 (4 - n),
lapho n iyinani leminyaka.
Ukusoka kwekhanda ne-thorax
Umjikelezo wekhanda lengane liyi-32-34 cm. Isikali sekhanda sanda ngokushesha kakhulu ezinyangeni zokuqala zokuphila:
ku-trimester yokuqala - 2 cm ngenyanga;
kwi-trimester yesibili - 1 cm ngenyanga;
engxenyeni yesithathu yonyaka - 0.5 cm ngenyanga.
Okushiwo ukuzungeza ikhanda kubantwana beminyaka ehlukile
Ubudala - Isihloko sekhanda, cm
Usana olusha olusha 34-35
Izinyanga ezintathu - 40
Izinyanga ezingu-6 - 43
Izinyanga ezingu-12 - 46
Iminyaka emibili - 48
Iminyaka engu-4 - 50
Uneminyaka engu-12 ubudala - 52
Umjikelezo wesifuba ebantwaneni osanda kuzalwa ungaphansi kwe-1-2 cm kune-circumference yekhanda. Kuze ezinyangeni ezingu-4 kukhona ukulingana kwe-thorax enekhanda, kamuva umjikelezo we-thorax ukwanda ngokushesha kunomjikelezo wekhanda.
Umjikelezo wesisu kufanele ube mncane kakhulu (ngo-1 cm) ku-circumference esifubeni. Le nkhomba iyafundisa kuze kube yiminyaka engu-3.